COMFAST CF-953AX - chipset: mt7921au

[foen73]

[Info] Yesterday my new toy arrived and really worked out of the box, at least with the mainline kernel 5.18.12. With standard Ubuntu kernels, I tested 5.15.0.41.43 & 5.17.0.1013.12 (OEM), it does not work without further action.

Speedtest by Ookla

Server: iway AG - Zurich (id = 3188)
ISP: Vodafone Germany
Latency: 24.94 ms (39.31 ms jitter)
Download: 390.00 Mbps (data used: 460.7 MB)
Upload: 25.01 Mbps (data used: 43.2 MB)
Packet Loss: 0.0%

lsusb
Bus 002 Device 007: ID 0e8d:7961 MediaTek Inc. Wireless_Device

uname -a
Linux foen-ThinkPad-T570 5.18.12-051812-generic #202207150942 SMP PREEMPT_DYNAMIC Fri Jul 15 10:10:55 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

dmesg
[ 1038.765594] usb 2-2: new SuperSpeed USB device number 7 using xhci_hcd
[ 1038.788041] usb 2-2: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
[ 1038.788045] usb 2-2: New USB device strings: Mfr=6, Product=7, SerialNumber=8
[ 1038.788047] usb 2-2: Product: Wireless_Device
[ 1038.788048] usb 2-2: Manufacturer: MediaTek Inc.
[ 1038.788049] usb 2-2: SerialNumber: 000000000
[ 1041.272871] Bluetooth: hci0: Device setup in 2418728 usecs
[ 1043.297145] Bluetooth: hci0: Opcode 0x c03 failed: -110
[ 1045.313182] Bluetooth: hci0: Failed to read MSFT supported features (-110)
[ 1047.329075] Bluetooth: hci0: AOSP get vendor capabilities (-110)
[ 1047.457597] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd
[ 1047.507236] mt7921u 2-2:1.3: HW/SW Version: 0x8a108a10, Build Time: 20220209150832a

[ 1047.602000] Bluetooth: hci0: Device setup in 117882 usecs
[ 1047.666384] Bluetooth: hci0: AOSP extensions version v1.00
[ 1047.666390] Bluetooth: hci0: AOSP quality report is supported
[ 1047.757820] mt7921u 2-2:1.3: WM Firmware Version: ____010000, Build Time: 20220209150915
[ 1049.373255] mt7921u 2-2:1.3 wlxe0e1a934a1bb: renamed from wlan0
[ 1053.039692] wlxe0e1a934a1bb: authenticate with 88:dc:96:8d:1a:fd
[ 1053.576871] wlxe0e1a934a1bb: send auth to 88:dc:96:8d:1a:fd (try 1/3)
[ 1053.585139] wlxe0e1a934a1bb: authenticated
[ 1053.592626] wlxe0e1a934a1bb: associate with 88:dc:96:8d:1a:fd (try 1/3)
[ 1053.608944] wlxe0e1a934a1bb: RX AssocResp from 88:dc:96:8d:1a:fd (capab=0x1511 status=0 aid=7)
[ 1053.636803] wlxe0e1a934a1bb: associated
[ 1053.687419] wlxe0e1a934a1bb: Limiting TX power to 20 (23 - 3) dBm as advertised by 88:dc:96:8d:1a:fd
[ 1053.735668] IPv6: ADDRCONF(NETDEV_CHANGE): wlxe0e1a934a1bb: link becomes ready

Interestingly, with the standard Ubuntu kernel the BT part works, which I am neither interested in nor have I tested for functionality, but at least the dmseg output looks good here.

[morrownr]

@sjtmbg

"/sys/bus/usb/drivers/mt7921u/new_id"

I really appreciate this bit of info. I had never heard of this but have now posted it on the site in a couple of places for users to see.

Here is the example. It is for the Netgear A8000:

su
modprobe mt7921u
echo 0846 9060 > /sys/bus/usb/drivers/mt7921u/new_id

"lsusb -d 3574:6211"

This info really should go in the kernel. Do you know how to submit patches to linux-wireless?

[morrownr]

@morrownr:

What are you testing with?

953 on 6.2 kernel and udev 250

@rindeal

I added your guidance to the Netgear A8000 and Comfast CF-953AX adapters as listed in the Plug and Play list, Main Menu item 2. Would you mind reading what I put for both adapters to see if I did it correctly. I don't have any adapters that don't already have the VID/PID in the kernel and it would take time to take a VID/PID out and recompile.

If things are correct, do you mind if I give credit to you?

@morrownr

[sjtmbg]

Thank you to @rindeal for the persistent udev solution, works great for me.

Having recently upgraded some boxes to ubuntu 23.04, I see that the 8822bu driver comes with the 6.2.0 kernel. For probably a year now I've been compiling and using the 88x2bu.ko driver and getting download speeds that max out with what I get from my ISP (~200Mbps). With the driver that comes with the 6.2.0 kernel, my typical download speeds are about 25 Mbps. Any suggestions where I should start a new thread on this?

[morrownr]

Having recently upgraded some boxes to ubuntu 23.04, I see that the 8822bu driver comes with the 6.2.0 kernel. For probably a year now I've been compiling and using the 88x2bu.ko driver and getting download speeds that max out with what I get from my ISP (~200Mbps). With the driver that comes with the 6.2.0 kernel, my typical download speeds are about 25 Mbps. Any suggestions where I should start a new thread on this?

Just start a new thread here Issues. Maybe the title should ask for what performance people are seeing with the rtl8812bu in-kernel driver?

I have been testing with kernel 6.3. Performance and stability is much better. 6.4 should even be better.

Do you use the 88x2bu driver here? The install and remove scripts automatically blacklist and unblacklist the in-kernel driver so you don't have to.

[sjtmbg]

Thanks for that info, I hadn't realized the install script did the blacklisting. I usually run make manually because I think I learn more that way. I've used the the 88x2bu driver here in the past but more recently have used RinCat's (that's where my performance numbers are coming from).

[rindeal]

@morrownr:
I added your guidance to the Netgear A8000 and Comfast CF-953AX adapters as listed in the Plug and Play list, Main Menu item 2. Would you mind reading what I put for both adapters to see if I did it correctly. I don't have any adapters that don't already have the VID/PID in the kernel and it would take time to take a VID/PID out and recompile.

The upstream patch for Comfast 952/953 is included in kernel 6.3, not 6.2. Otherwise LGTM.
Also you might want to consider providing a link to just download the file like this 90-mt7921u-wifi6-usb.rules.zip, as it might be quicker and less prone to errors.

@morrownr:
If things are correct, do you mind if I give credit to you?

Yes, but thank you for asking.

[Zen3515]

Btw, I forget to tell you, I got all 3 of mine working in 802.11ac mode with a custom Linux kernel that I compiled yesterday. (6.1.19)

But you can achieve the same results using echo and modprobe I think.

I'll begin testing if the 0 MB/s problem affect me on Monday.

[fs30000]

I got a comfast-CF-953AX too.

lsusb shows:
Bus 002 Device 003: ID 0e8d:7961 MediaTek Inc. Wireless_Device

On the pci.ids file it shows up as:
7961 MT7921 802.11ax PCI Express Wireless Network Adapter

But can't get it to work in AP mode, with hostapd. Put it on windows, couldn't activate the mobile hotspot. Using comfast drivers. Hmmm....

[morrownr]

Hi @foen73

Thanks for the report.

[ 1047.757820] mt7921u 2-2:1.3: WM Firmware Version: ____010000, Build Time: 20220209150915

There is a later firmware that is available. To install/update, go to the following link and go to the mt7921 section:

https://github.com/morrownr/USB-WiFi/blob/main/home/How_to_Install_Firmware_for_Mediatek_based_USB_WiFi_adapters.md

Would you mind running iw list and post the results for the CF-953AX? Keep in mind that if you have 2 wifi devices, there will be two outputs.

Also, would you mind deactivating usb_modeswitch so we can make sure that this is a single-state adapter? If so, look at the last section at the below link:

https://github.com/morrownr/USB-WiFi/blob/main/home/How_to_Modeswitch.md

Thanks

[foen73]

Hi @morrownr,

First of all, I would like to thank you very much for the great provision of your useful information. I already have the current firmware on the computer, but I was primarily interested in exploring the extent to which a real out of box experience (related to Ubuntu 22.04) is given. That's why I'm especially happy to confirm that it's definitely a single state adapter. I will attach the iw list output as a text file.

iw list of CF-953AX.txt

Kind regards,
Sebastian

[Zen3515]

As an update WiFi6 also works, but this USB AP is very slow.
Can anyone confirm my findings, CF-953AX in Access point mode using config from this repo

I can only get maximum of around 240 Mbits/sec with iperf -c 192.168.1.1
Is it just me or this card doesn't working very well in AP mode?

[morrownr]

Is it just me or this card doesn't working very well in AP mode?

I'm testing the hostapd.conf you provided the link to above with a CF-951AX. This adapter appears to be the same as the 953 but does not have the external antennas. I'm seeing around 306 Mbps with iperf3 which is pretty good given the limitations I currently have. The channel has some congestion and the distance is about 8 meters through 2 walls. I am seeing WiFi 6 with link rates of up to 1200 Mbps. I'm just not that well equipment for WiFi 6 testing yet but am doing my best. The hostapd.conf, that I am working on, and you are using, may not be optimal. I am simply using trial and error to work on it. We have no prior art to look at for examples.

I did not answer your question as I don't have a 953. My 951 does not have above average range as we should expect from a low cost adapter that does not have external antennas but it is what I currently have to test with. Actually, I think it is doing fairly good for what it is... it is not an adapter that I am recommending to folks that want AP mode with long range but it is fun to play with.

@morrownr

[Zen3515]

I managed to get around 500-600 when standing next to the WiFi card now that I have changed to another channel.

It's quite fast but the speed dramatically decreases over just a few centimeters.

Btw, do you have any card recommendations for AP Mode?

[morrownr]

Btw, do you have any card recommendations for AP Mode?

Good question. Of the 6 known adapters that use the mt7921au chipset, the only one that I think would currently make a good AP is the Alfa AXML. That opinion is based on the long removable antennas that it has and Alfa generally uses good quality components. I suspect we will see several new adapters this year. I hear a rumor that a long range adapter with the mt7922u chipset may come out later this year. I am interested in that. When I say long range, I am talking about adapters like the Alfa ACHM and ACH. They contain very high quality antennas and amps which allows them to have longer range than other adapters but that does come with a cost.

When I say mt7922u chipset, it is the sister of the mt7912au. They both use the mt7921u driver. The difference is that the 7922u has 160 MHz channel width capability. Whew. Can you say > 1 Gbps WiFi? My main wifi router is capable of 160 MHz channel width on 5 GHz so I'd like to see the results.

[morrownr]

Hi @sektorhybrid

I am not seeing any problems but then there are a lot of ways to do this and I don't have the full picture. What you might want to do is start a new issue with enough details for folks to fully understand your setup. Many folks that stop by don't read down into old, long threads like this.

[sektorhybrid]

@morrownr thank you. Issue raised with more details in #254

[Lou78900]

Hello can someone help me to use my Cf 952ax in kali linux, I have purchased this product and I have Downloaded Drivers but it is impossible to make it work with kali Linux. I’m not professional so I need your help please

[morrownr]

Hi @Lou78900

Open a terminal interface (aka command line interface) and run the following command:

$ lsusb

Post the results so we can see what this adapter uses for a chipset.

[Lou78900]

[morrownr]

Are you running Kali in a VM?

[Lou78900]

Yes

[morrownr]

Okay, Kali is running in a VM.

I’m not professional so I need your help please

This could be a challenge. Let me offer you an alternative: Get an older system that still runs and install Kali as the only OS. Older systems that are no longer used are all over the place. Maybe you have one that you can use or maybe someone else in your family or you could ask some business owners if they have any old systems that still work that they could give you for free.

[Lou78900]

Thank you verry mach your assistance, did you mean old version of vmware if it is that please give me examples for the versions that it can work with this usb and to got it easily thank you so much

[morrownr]

did you mean old version of vmware?

No. I am recommending that you do not use a VM at all.

Any computer whether laptop, desktop or mini that has at least a 2 core AMD/Intel CPU that is 64 bit and has 2-4 Gb of RAM should work fine and then you don't have to fight with a VM. So basically, if you have or can find an OLD computer that has been sold sometime in the last 15 years, it should work for Linux and you don't have to deal with a VM.

[Lou78900]

Ok thank you for you’re help it’s like you have resolved my probleme thank you. I have Dell 7490 i5 vpro 8th 8gb-250gb m…..I will try to use linux without VMware i wish it will be fine.thank’s

[morrownr]

Dell 7490 i5...

That is a lot of power for Linux. If you have questions about doing a clean install, let me know.

Things should be easier to deal with and the learning less frustrating.

[Lou78900]

Yes I would how I can do a clean install please and another time thank you verry much for this help and assistance, you are verry kind

[morrownr]

But can't get it to work in AP mode, with hostapd.

Gimme some details. What distro, computer and band are you using?

[fs30000]

Ok, put the adapter on a Lenovo thinkpad laptop. Running proxmox 7.3. Kernel is 5.15.85-1-pve.

It doesn't show up in "ip a". The module mt7921e isn't loaded automatically. After loading it, the adapter still doesn't show up in "ip a". I'm guessing there's many usb ids for this comfast adapter. There isn't /sys/bus/usb/drivers/mt7921u/, so can't echo the usb id there.

ID 0e8d:7961 MediaTek Inc. Wireless_Device

** lsusb -d 0e8d:7961 -v**

Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.20
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0         9
  idVendor           0x0e8d MediaTek Inc.
  idProduct          0x7961
  bcdDevice            1.00
  iManufacturer           6 MediaTek Inc.
  iProduct                7 Wireless_Device
  iSerial                 8 000000000
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x01fa
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          9 Config_01
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              160mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         3
      bFunctionClass        224 Wireless
      bFunctionSubClass       1 Radio Frequency
      bFunctionProtocol       1 Bluetooth
      iFunction               5 BT_FUNCTION
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              1 BT_ACL_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0000  1x 0 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0000  1x 0 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0009  1x 9 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0009  1x 9 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0011  1x 17 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0011  1x 17 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0019  1x 25 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0019  1x 25 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0021  1x 33 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0021  1x 33 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       5
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0031  1x 49 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0031  1x 49 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       6
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              2 BT_SCO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x003f  1x 63 bytes
        bInterval               4
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x003f  1x 63 bytes
        bInterval               4
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              3 BT_ISO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x8a  EP 10 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x0a  EP 10 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              3 BT_ISO_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x8a  EP 10 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x0a  EP 10 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
        bMaxBurst               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           9
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              4 WiFi_If
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x08  EP 8 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x06  EP 6 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x07  EP 7 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x09  EP 9 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0002  1x 2 bytes
        bInterval               1
        bMaxBurst               0
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength       0x0016
  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x0000f11e
      BESL Link Power Management (LPM) Supported
    BESL value      256 us
    Deep BESL value    61440 us
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000e
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat          10 micro seconds
    bU2DevExitLat         180 micro seconds
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0000
  (Bus Powered)

[fs30000]

Again, no idea why the text gets so uneven with the Add Code thing here...

EDIT: Ok, used the quadruple ` thingies. Looks ok now.

[morrownr]

adapter on a Lenovo thinkpad laptop

Hmmm...

Kernel is 5.15.85-1-pve.

That level of kernel supports the mt7921 chipset with the mt7921e driver but you will need at least kernel 5.19 to support a usb adapter based on the mt7921au chipset in order to do AP mode with the 953AX adapter.

Big hmmm...

The module mt7921e isn't loaded automatically...

It should not be unless you have an internal card based on the mt7921 or mt7921k. mt7921e is the driver for the PCIe version of the chipset. The usb adapter driver is called mt7921u.

What does the following say?

lspci

My best guess at this point is that you need to look at installing a distro that has at least kernel 5.19 and then you need to upgrade the firmware to the latest (guide on the Main Menu).

[fs30000]

Ok, you're right, so i'm in the process of making it work on a VM on virtualbox, with the adapter mapped to the vm. If that doesn't work, then ok, i'll try it on another pc, the one i tried in very first time.

[fs30000]

Ok, so i tried on a VM.
Rocky 9
Mainline kernel 6.2.2
mt7921u module.

simple hostapd.conf file:

interface=wlp0s12u1i3
bridge=br0
driver=nl80211

ssid=comfast
wpa_passphrase=12345678
country_code=PT

auth_algs=3
macaddr_acl=0
ignore_broadcast_ssid=0
wpa=2
rsn_pairwise=CCMP
wpa_key_mgmt=WPA-PSK

ieee80211d=1
ieee80211h=1

hw_mode=g
channel=6


ieee80211n=1
wmm_enabled=1


ht_capab=[SHORT-GI-20]

My phone connects and then disconnects immediately. With a intel AX-201 client, it connects, but pings are very unstable, iperf3 is 0 MB/s. I'll try again on another pc later. Right now, not much time.

[morrownr]

Try this distro since you are testing in a VM:

https://cdimage.ubuntu.com/daily-live/current/lunar-desktop-amd64.iso

Try the following. I made some changes:

interface=wlp0s12u1i3
bridge=br0
driver=nl80211

ssid=comfast
wpa_passphrase=12345678
country_code=PT

auth_algs=1
macaddr_acl=0
ignore_broadcast_ssid=0
wpa=2
wpa_pairwise=CCMP
wpa_key_mgmt=WPA-PSK

ieee80211d=1

hw_mode=g
channel=6


ieee80211n=1
wmm_enabled=1

This sounds like a security issue and it may be triggered by a couple of settings in hostapd.conf.

If neither of the above help, try a very simple 5 GHz band hostapd.conf.

[fs30000]

@morrownr something is bad. I run that .iso live on the VM. I connected as a client to my wifi6 xiaomi AP, did a iperf3 test, but everything was at 0 MB/s and then it stalled. The wifi interface disappeared from "ip a". Also drom Ubuntu's Settings panel. Exactly same thing happened before when i tested on a physical machine running Rocky 9.

I am testing it on a windows laptop. It works great. From a linux VM bridged to Windows network, it does 77 MB/s on reverse mode and 69 MB/s normal mode. Pings to the AP are 2ms or below.

Something wrong with the driver.

[bjlockie]

I downloaded the iso and booted it in virtualbox and then plugged in
I couldn't attach it to virttualbox.
dmesg on the machine running virtualbox said:

[ 1936.607054] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 1936.607056] CPU: 10 PID: 13160 Comm: systemd-udevd Tainted: G           OE      6.2.5-060205-generic #202303110831
[ 1936.607058] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./B450M Pro4, BIOS P5.70 10/20/2022
[ 1936.607059] RIP: 0010:mt7921_check_offload_capability+0xdf/0x150 [mt7921_common]
[ 1936.607065] Code: eb 7c 0f b7 03 0f b6 53 02 01 d0 48 98 49 8d 1c 04 48 39 cb 73 68 80 7b 03 04 4c 8d 63 04 75 e2 e8 b6 f0 0f cc 4d 85 e4 74 46 <0f> b6 43 05 48 8b 55 e8 65 48 2b 14 25 28 00 00 00 75 4a 48 83 c4
[ 1936.607066] RSP: 0018:ffffaf7556d0fa48 EFLAGS: 00010282
[ 1936.607068] RAX: 0000000000000000 RBX: ffffaf7545e80a64 RCX: 0000000000000000
[ 1936.607069] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1936.607069] RBP: ffffaf7556d0fa68 R08: 0000000000000000 R09: 0000000000000000
[ 1936.607070] R10: 0000000000000000 R11: 0000000000000000 R12: ffffaf7545e80a68
[ 1936.607071] R13: ffffffffc107c1f0 R14: ffff9b80188ef000 R15: ffff9b80115dc430
[ 1936.607071] FS:  00007f831ae578c0(0000) GS:ffff9b832f080000(0000) knlGS:0000000000000000
[ 1936.607073] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1936.607073] CR2: ffffaf7545e80a69 CR3: 00000001d640e000 CR4: 0000000000750ee0
[ 1936.607074] PKRU: 55555554
[ 1936.607075] Call Trace:
[ 1936.607076]  <TASK>
[ 1936.607078]  mt7921u_probe+0x2e/0x290 [mt7921u]
[ 1936.607082]  usb_probe_interface+0xee/0x300
[ 1936.607085]  really_probe+0x1e3/0x440
[ 1936.607088]  __driver_probe_device+0x8c/0x1a0
[ 1936.607090]  driver_probe_device+0x24/0xd0
[ 1936.607092]  __driver_attach+0x10b/0x210
[ 1936.607093]  ? __pfx___driver_attach+0x10/0x10
[ 1936.607094]  bus_for_each_dev+0x90/0xe0
[ 1936.607096]  driver_attach+0x1e/0x30
[ 1936.607097]  bus_add_driver+0x152/0x250
[ 1936.607099]  driver_register+0x81/0x150
[ 1936.607100]  usb_register_driver+0x8d/0x180
[ 1936.607102]  ? __pfx_init_module+0x10/0x10 [mt7921u]
[ 1936.607105]  mt7921u_driver_init+0x23/0xff0 [mt7921u]
[ 1936.607107]  do_one_initcall+0x5e/0x250
[ 1936.607111]  do_init_module+0x50/0x230
[ 1936.607113]  load_module+0xc76/0xd60
[ 1936.607114]  ? kernel_read_file+0x2a4/0x320
[ 1936.607117]  __do_sys_finit_module+0xc4/0x140
[ 1936.607118]  ? __do_sys_finit_module+0xc4/0x140
[ 1936.607120]  __x64_sys_finit_module+0x18/0x30
[ 1936.607122]  do_syscall_64+0x5b/0x90
[ 1936.607124]  ? syscall_exit_to_user_mode+0x29/0x50
[ 1936.607125]  ? do_syscall_64+0x67/0x90
[ 1936.607126]  ? do_syscall_64+0x67/0x90
[ 1936.607127]  ? do_syscall_64+0x67/0x90
[ 1936.607128]  entry_SYSCALL_64_after_hwframe+0x72/0xdc
[ 1936.607131] RIP: 0033:0x7f831ad16c4d
[ 1936.607132] Code: 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 83 f1 0d 00 f7 d8 64 89 01 48
[ 1936.607133] RSP: 002b:00007fffbbe29948 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1936.607135] RAX: ffffffffffffffda RBX: 000055e5a3db0fa0 RCX: 00007f831ad16c4d
[ 1936.607135] RDX: 0000000000000000 RSI: 00007f831af1a458 RDI: 000000000000000d
[ 1936.607136] RBP: 00007f831af1a458 R08: 0000000000000000 R09: 00007fffbbe29a70
[ 1936.607137] R10: 000000000000000d R11: 0000000000000246 R12: 0000000000020000
[ 1936.607138] R13: 000055e5a3dd2620 R14: 0000000000000000 R15: 000055e5a3cbfef0
[ 1936.607139]  </TASK>
[ 1936.607139] Modules linked in: btrtl mt7921u(+) btbcm btintel mt76_usb btmtk snd_seq_dummy vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) cmac tls ccm nf_tables nfnetlink nls_utf8 cifs cifs_arc4 nvme_fabrics cifs_md4 fscache netfs bluetooth ecdh_generic ecc binfmt_misc snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi mt7921e snd_hda_intel snd_intel_dspcfg mt7921_common snd_intel_sdw_acpi snd_hda_codec mt76_connac_lib snd_usb_audio uvcvideo snd_hda_core mt76 snd_usbmidi_lib videobuf2_vmalloc snd_hwdep videobuf2_memops intel_rapl_msr videobuf2_v4l2 intel_rapl_common snd_seq_midi snd_seq_midi_event mac80211 videodev edac_mce_amd snd_rawmidi joydev input_leds videobuf2_common snd_seq kvm_amd apple_mfi_fastcharge nls_iso8859_1 mc snd_pcm kvm snd_seq_device irqbypass snd_timer rapl wmi_bmof k10temp cfg80211 snd soundcore libarc4 ccp mac_hid nct6775 nct6775_core hwmon_vid msr parport_pc ppdev lp parport ramoops reed_solomon pstore_blk pstore_zone efi_pstore ip_tables
[ 1936.607167]  x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c dm_mirror dm_region_hash dm_log nouveau mxm_wmi video i2c_algo_bit drm_ttm_helper ttm drm_display_helper cec hid_apple rc_core hid_generic drm_kms_helper crct10dif_pclmul uas nvme syscopyarea crc32_pclmul sysfillrect polyval_clmulni sysimgblt usbhid hid usb_storage polyval_generic ghash_clmulni_intel sha512_ssse3 aesni_intel crypto_simd drm cryptd i2c_piix4 r8169 nvme_core ahci xhci_pci realtek libahci xhci_pci_renesas nvme_common wmi gpio_amdpt
[ 1936.607185] CR2: ffffaf7545e80a69
[ 1936.607186] ---[ end trace 0000000000000000 ]---
[ 1936.737205] RIP: 0010:mt7921_check_offload_capability+0xdf/0x150 [mt7921_common]
[ 1936.737215] Code: eb 7c 0f b7 03 0f b6 53 02 01 d0 48 98 49 8d 1c 04 48 39 cb 73 68 80 7b 03 04 4c 8d 63 04 75 e2 e8 b6 f0 0f cc 4d 85 e4 74 46 <0f> b6 43 05 48 8b 55 e8 65 48 2b 14 25 28 00 00 00 75 4a 48 83 c4
[ 1936.737216] RSP: 0018:ffffaf7556d0fa48 EFLAGS: 00010282
[ 1936.737218] RAX: 0000000000000000 RBX: ffffaf7545e80a64 RCX: 0000000000000000
[ 1936.737219] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1936.737220] RBP: ffffaf7556d0fa68 R08: 0000000000000000 R09: 0000000000000000
[ 1936.737220] R10: 0000000000000000 R11: 0000000000000000 R12: ffffaf7545e80a68
[ 1936.737221] R13: ffffffffc107c1f0 R14: ffff9b80188ef000 R15: ffff9b80115dc430
[ 1936.737222] FS:  00007f831ae578c0(0000) GS:ffff9b832f080000(0000) knlGS:0000000000000000
[ 1936.737223] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1936.737223] CR2: ffffaf7545e80a69 CR3: 00000001d640e000 CR4: 0000000000750ee0
[ 1936.737224] PKRU: 55555554
[ 1936.737225] note: systemd-udevd[13160] exited with irqs disabled

I wonder if it is related to the USB subsystem.
I have a 7921k PCI card in my system and it wouldn't boot until I disconnected the bluetooth (USB) cable.
I also moved around where some external USB were plugged in (maybe a bug sharing ports?).

I rebooted and tried the CF-953AX by itself and it seems to work fine.
iperf3 to a server on my phone:

[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  15.4 MBytes   129 Mbits/sec    0    687 KBytes       
[  5]   1.00-2.00   sec  20.0 MBytes   168 Mbits/sec    0    812 KBytes       
[  5]   2.00-3.00   sec  21.2 MBytes   178 Mbits/sec    0    812 KBytes       
[  5]   3.00-4.00   sec  25.0 MBytes   210 Mbits/sec    0   1.05 MBytes       
[  5]   4.00-5.00   sec  25.0 MBytes   210 Mbits/sec    6    839 KBytes       
[  5]   5.00-6.00   sec  25.0 MBytes   210 Mbits/sec    0    923 KBytes       
[  5]   6.00-7.00   sec  23.8 MBytes   199 Mbits/sec    0    983 KBytes       
[  5]   7.00-8.00   sec  25.0 MBytes   210 Mbits/sec    0   1.00 MBytes       
[  5]   8.00-9.00   sec  26.2 MBytes   220 Mbits/sec    8    723 KBytes       
[  5]   9.00-10.00  sec  22.5 MBytes   189 Mbits/sec    0    782 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   229 MBytes   192 Mbits/sec   14             sender
[  5]   0.00-10.00  sec   227 MBytes   191 Mbits/sec                  receiver

ping to my phone:
rtt min/avg/max/mdev = 7.923/135.093/358.414/94.671 ms

[fs30000]

Well then, i don't know what's wrong with this comfast. Maybe another version of the same chip. But again, on windows using comfast drivers, it seems to work really great. Actually it's a bit faster than the laptop's own intel ax201. Anyway, i'm having luck with the mt7922 pcie card i also been posting on the other issue. So, this comfast adapter is going to decommissioned :)

[Zen3515]

I bought 3 directly from Taobao China. I was expecting it to be 0e8d:7961 but it turns out as 3574:6211.

ip a

Shows the interface but if I configure it to do anything, it causes kernel panic.

[   31.805490] BUG: kernel NULL pointer dereference, address: 0000000000000008
[   31.812785] #PF: supervisor read access in kernel mode
[   31.818245] #PF: error_code(0x0000) - not-present page
[   31.823712] PGD 0 P4D 0
[   31.826572] Oops: 0000 [#1] PREEMPT SMP PTI
[   31.831080] CPU: 3 PID: 1925 Comm: ip Not tainted 6.1.19-amd64-vyos #1
[   31.837925] Hardware name: To be filled by O.E.M. To be filled by O.E.M./MAHOBAY, BIOS 4.6.5 02/19/2019
[   31.847963] RIP: 0010:mt7921_ipv6_addr_change+0x35/0x1a0 [mt7921_common]
[   31.855001] Code: 68 02 00 00 41 54 4c 89 ef 53 48 89 d3 48 83 e4 f0 48 83 ec 60 65 48 8b 04 25 28 00 00 00 48 89 44 24 58 48 8b 86 f8 06 00 00 <4c> 8b 60 08 0f b6 86 08 04 00 00 48 c7 44 24 05 00 00 00 00 88 44
[   31.874810] RSP: 0018:ffffaa17c0f9b880 EFLAGS: 00010282
[   31.880400] RAX: 0000000000000000 RBX: ffff95c44992b800 RCX: 0000000000000000
[   31.887899] RDX: ffff95c44992b800 RSI: ffff95c448a15ba0 RDI: ffff95c44992ba68
[   31.895405] RBP: ffffaa17c0f9b908 R08: ffff95c4467d03a0 R09: ffffca17bfd9cd88
[   31.902908] R10: 0000000000000dc0 R11: ffff95c4411cc000 R12: 0000000000000001
[   31.910413] R13: ffff95c44992ba68 R14: 00000000ffffffff R15: ffff95c44992b808
[   31.917918] FS:  00007f8e612232c0(0000) GS:ffff95c557380000(0000) knlGS:0000000000000000
[   31.926386] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.932504] CR2: 0000000000000008 CR3: 000000010764c004 CR4: 00000000001706e0
[   31.940018] Call Trace:
[   31.942853]  <TASK>
[   31.945332]  ieee80211_ifa6_changed+0x5a/0x70 [mac80211]
[   31.951043]  atomic_notifier_call_chain+0x4d/0x80
[   31.956130]  ipv6_add_addr+0x42c/0x6b0
[   31.960256]  inet6_addr_add+0xf7/0x2c0
[   31.964380]  inet6_rtm_newaddr+0x480/0x740
[   31.968853]  rtnetlink_rcv_msg+0x149/0x3b0
[   31.973325]  ? rtnl_calcit.isra.0+0x130/0x130
[   31.978048]  netlink_rcv_skb+0x4c/0xf0
[   31.982166]  netlink_unicast+0x234/0x380
[   31.986445]  netlink_sendmsg+0x21f/0x480
[   31.990728]  ? netlink_unicast+0x380/0x380
[   31.995173]  ____sys_sendmsg+0x2ba/0x2f0
[   31.999438]  ? copy_msghdr_from_user+0x68/0xa0
[   32.004223]  ___sys_sendmsg+0x81/0xd0
[   32.008227]  ? _raw_spin_unlock_irqrestore+0x1e/0x40
[   32.013530]  ? mod_objcg_state+0xc1/0x2c0
[   32.017881]  ? refill_obj_stock+0x100/0x1a0
[   32.022395]  ? __dentry_kill+0x130/0x170
[   32.026649]  ? __rseq_handle_notify_resume+0xa1/0x3e0
[   32.032024]  __sys_sendmsg+0x52/0xa0
[   32.035917]  do_syscall_64+0x3a/0x90
[   32.039798]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   32.045155] RIP: 0033:0x7f8e6135a980
[   32.049029] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d 61 fc 0c 00 00 74 17 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 89 54
[   32.068693] RSP: 002b:00007ffc3073d508 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   32.076579] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8e6135a980
[   32.084031] RDX: 0000000000000000 RSI: 00007ffc3073d570 RDI: 0000000000000003
[   32.091478] RBP: 0000000000000000 R08: 0000000064146fbb R09: 00005584dbc722a0
[   32.098922] R10: 00007ffc3073d114 R11: 0000000000000202 R12: 0000000064146fbc
[   32.106367] R13: 00005584d9f62020 R14: 0000000000000001 R15: 0000000000000000
[   32.113804]  </TASK>
[   32.116296] Modules linked in: nf_nat_tftp nf_conntrack_tftp nf_nat_sip nf_conntrack_sip nf_nat_pptp nf_conntrack_pptp nf_nat_h323 nf_conntrack_h323 nf_nat_ftp nf_conntrack_ftp nft_objref nft_ct nft_chain_nat nf_nat nf_tables nfnetlink_cthelper nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nfnetlink af_packet x86_pkg_temp_thermal intel_powerclamp coretemp mt7921u mt7921_common binfmt_misc crct10dif_pclmul crc32_pclmul mt76_connac_lib mt76_usb mt76 ghash_clmulni_intel mac80211 sha512_ssse3 sha512_generic aesni_intel cfg80211 crypto_simd cryptd libarc4 rapl intel_cstate intel_uncore evdev mei_me iTCO_wdt mei at24 iTCO_vendor_support pcspkr sg button mpls_iptunnel mpls_router ip_tunnel br_netfilter bridge stp llc fuse efi_pstore configfs ip_tables x_tables autofs4 usb_storage ohci_hcd uhci_hcd squashfs lz4_decompress zstd_decompress zstd_common loop overlay ext4 crc16 mbcache jbd2 nls_cp437 vfat fat efivarfs nls_ascii ax88179_178a usbnet mii sd_mod t10_pi crc64_rocksoft crc64 ata_piix libata
[   32.116348]  crc32c_intel igb i2c_i801 ehci_pci i2c_algo_bit i2c_smbus scsi_mod xhci_pci xhci_hcd scsi_common lpc_ich ehci_hcd e1000e fan thermal
[   32.220886] CR2: 0000000000000008
[   32.224591] ---[ end trace 0000000000000000 ]---
[   32.860706] RIP: 0010:mt7921_ipv6_addr_change+0x35/0x1a0 [mt7921_common]
[   32.867801] Code: 68 02 00 00 41 54 4c 89 ef 53 48 89 d3 48 83 e4 f0 48 83 ec 60 65 48 8b 04 25 28 00 00 00 48 89 44 24 58 48 8b 86 f8 06 00 00 <4c> 8b 60 08 0f b6 86 08 04 00 00 48 c7 44 24 05 00 00 00 00 88 44
[   32.887741] RSP: 0018:ffffaa17c0f9b880 EFLAGS: 00010282
[   32.893384] RAX: 0000000000000000 RBX: ffff95c44992b800 RCX: 0000000000000000
[   32.900940] RDX: ffff95c44992b800 RSI: ffff95c448a15ba0 RDI: ffff95c44992ba68
[   32.908499] RBP: ffffaa17c0f9b908 R08: ffff95c4467d03a0 R09: ffffca17bfd9cd88
[   32.916054] R10: 0000000000000dc0 R11: ffff95c4411cc000 R12: 0000000000000001
[   32.923618] R13: ffff95c44992ba68 R14: 00000000ffffffff R15: ffff95c44992b808
[   32.931179] FS:  00007f8e612232c0(0000) GS:ffff95c557380000(0000) knlGS:0000000000000000
[   32.939706] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.945877] CR2: 0000000000000008 CR3: 000000010764c004 CR4: 00000000001706e0
[   32.953435] Kernel panic - not syncing: Fatal exception
[   32.959078] Kernel Offset: 0x14200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   33.585568] ---[ end Kernel panic - not syncing: Fatal exception ]---

[morrownr]

@fs30000

Anyway, i'm having luck with the mt7922 pcie card i also been posting on the other issue. So, this comfast adapter is going to decommissioned :)

I'm follow the other thread. I even posted about 80+80.

If you are going to hang onto the Comfast adapter, maybe at a later time we can do a deep dive and see if we can determine the problem.

@bjlockie

I couldn't attach it to virttualbox.

Getting an os in a VM to properly use a wifi adapter can be a challenge. But don't ask me, I don't do VM's.

@Zen3515

I bought 3 directly from Taobao China. I was expecting it to be 0e8d:7961 but it turns out as 3574:6211.

You are the second person I have heard this from. Not sure what is going on.

[fs30000]

@fs30000

Anyway, i'm having luck with the mt7922 pcie card i also been posting on the other issue. So, this comfast adapter is going to decommissioned :)

I'm follow the other thread. I even posted about 80+80.

If you are going to hang onto the Comfast adapter, maybe at a later time we can do a deep dive and see if we can determine the problem.

Ok, later after they update the driver a few times, we can try again.

I bought 3 directly from Taobao China. I was expecting it to be 0e8d:7961 but it turns out as 3574:6211.

You are the second person I have heard this from. Not sure what is going on.

Yep, something fishy going on.

[bjlockie]

What's the link to the product you bought?

[fs30000]

https://www.aliexpress.com/item/1005004469569274.html

[bjlockie]

I think 6211 is the product id of the Bluetooth part of my mt7921k (pci). I disconnected the Bluetooth part but I think it is. :-) I don't know who 3574 is.

[morrownr]

I think 6211 is the product id of the Bluetooth part of my mt7921k (pci).

Back in January, a user here mentioned that he had bought a cf-952ax adapter and discovered that it had a mt7921au chipset. He also discovered it used a company specific VID/PID as follows:

3574:6211

He then submitted a patch that is in the kernel but I would have to research exactly when it went in.

So, it seems that cf-952ax and some cf-953ax adapters use that VIS-PID. Comfast seems to be making a little mess.

But you can achieve the same results using echo and modprobe I think.

#218

[sektorhybrid]

Hello @morrownr

I used the config from @Zen3515 's repo in an old NUC I am using & trying to test hostapd AP (CF-953AX 0e8d:7961 / 6.2.12-1-MANJARO). The box freezes always while receiving the first 4-Way handshake from the first STA trying to connect. After that I also tested "n" mode and had the same results. I also tested with USB2 port, USB3 port, externally powered hub etc

Any thought regarding the hangs ? Logs from previous boot that ultimately hanged

Απρ 22 02:48:35.535334 kitana kernel: Bluetooth: hci0: Device setup in 2567476 usecs
Απρ 22 02:48:35.535552 kitana kernel: Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.
Απρ 22 02:48:37.688685 kitana kernel: Bluetooth: hci0: Opcode 0x c03 failed: -110
Απρ 22 02:48:39.822076 kitana kernel: Bluetooth: hci0: Failed to read MSFT supported features (-110)
Απρ 22 02:48:41.952001 kitana kernel: Bluetooth: hci0: AOSP get vendor capabilities (-110)
Απρ 22 02:48:42.075371 kitana kernel: usb 2-2: reset SuperSpeed USB device number 3 using xhci_hcd
Απρ 22 02:48:42.118747 kitana kernel: usbcore: registered new interface driver mt7921u
Απρ 22 02:48:42.118975 kitana kernel: mt7921u 2-2:1.3: HW/SW Version: 0x8a108a10, Build Time: 20230302150916a
Απρ 22 02:48:42.215386 kitana kernel: Bluetooth: hci0: Device setup in 118568 usecs
Απρ 22 02:48:42.215565 kitana kernel: Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.
Απρ 22 02:48:42.275340 kitana kernel: Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Απρ 22 02:48:42.275531 kitana kernel: Bluetooth: BNEP filters: protocol multicast
Απρ 22 02:48:42.275634 kitana kernel: Bluetooth: BNEP socket layer initialized
Απρ 22 02:48:42.285378 kitana kernel: Bluetooth: hci0: AOSP extensions version v1.00
Απρ 22 02:48:42.285556 kitana kernel: Bluetooth: hci0: AOSP quality report is supported
Απρ 22 02:48:42.285618 kitana kernel: Bluetooth: MGMT ver 1.22
Απρ 22 02:48:42.298724 kitana kernel: NET: Registered PF_ALG protocol family
Απρ 22 02:48:42.368685 kitana kernel: mt7921u 2-2:1.3: WM Firmware Version: ____010000, Build Time: 20230302150956
Απρ 22 02:48:43.995371 kitana kernel: mt7921u 2-2:1.3 wlanap_CF953AX: renamed from wlan0
Απρ 22 02:49:03.572020 kitana kernel: br0: port 2(wlanap_CF953AX) entered blocking state
Απρ 22 02:49:03.572263 kitana kernel: br0: port 2(wlanap_CF953AX) entered disabled state
Απρ 22 02:49:03.572729 kitana kernel: device wlanap_CF953AX entered promiscuous mode
Απρ 22 02:49:14.609044 kitana kernel: IPv6: ADDRCONF(NETDEV_CHANGE): wlanap_CF953AX: link becomes ready
Απρ 22 02:49:14.609105 kitana kernel: br0: port 2(wlanap_CF953AX) entered blocking state
Απρ 22 02:49:14.609148 kitana kernel: br0: port 2(wlanap_CF953AX) entered forwarding state
Απρ 22 02:49:36.257522 kitana kernel: skbuff: skb_under_panic: text:ffffffffc1973569 len:658 put:4 head:ffff9d6419977c00 data:ffff9d6419977>
Απρ 22 02:49:36.257882 kitana kernel: ------------[ cut here ]------------
Απρ 22 02:49:36.266336 kitana kernel: kernel BUG at net/core/skbuff.c:121!

Tested a multitude of configs with exact same result, indicatively

interface=wlanap_CF953AX
bridge=br0
ssid=killing_technology
bssid=d0:37:45:96:50:51
wpa_passphrase=XXXXXXXXXXXXXXXXX
hw_mode=a
channel=36
chanlist=36
vht_oper_chwidth=1
he_oper_chwidth=1
vht_oper_centr_freq_seg0_idx=42
he_oper_centr_freq_seg0_idx=42
country_code=US
ieee80211d=1
driver=nl80211
logger_syslog=1
logger_syslog_level=2
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
beacon_int=100
dtim_period=2
multicast_to_unicast=0
tx_queue_data2_burst=2.0
uapsd_advertisement_enabled=1
utf8_ssid=1
multi_ap=0
bss_load_update_period=60
chan_util_avg_period=600
disassoc_low_ack=1
skip_inactivity_poll=0
preamble=1
auth_algs=3
macaddr_acl=0
ignore_broadcast_ssid=0
okc=1
wpa=2
wpa_pairwise=CCMP CCMP-256
wpa_key_mgmt=WPA-PSK
ieee80211w=1
sae_require_mfp=1
ieee80211n=1
wmm_enabled=1
ht_capab=[LDPC][HT40+][HT40-][GF][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][MAX-AMSDU-7935]
ieee80211ac=1
vht_capab=[RXLDPC][SHORT-GI-80][TX-STBC-2BY1][SU-BEAMFORMEE][MU-BEAMFORMEE][RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN][RX-STBC-1][BF-ANTENNA-4][MAX-MPDU-11454][MAX-A-MPDU-LEN-EXP7]
ieee80211ax=1
he_bss_color=37
he_default_pe_duration=4
he_rts_threshold=1023

country_code=FM
interface=wlanap_CF953AX
bridge=br0
driver=nl80211
wpa=2
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
ssid=killing_technology
bssid=d0:37:45:96:50:51
wpa_passphrase=XXXXXXXXXXXX
hw_mode=g
channel=6
ieee80211n=1
ieee80211d=1
wmm_enabled=1
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
logger_syslog=-1
logger_syslog_level=1
logger_stdout=-1
logger_stdout_level=1
ctrl_interface=/var/run/hostapd_CF953AX

PS: Any advice like opening an issue in your repo or elsewere instead of commenting to a General thread is welcome.