FS#2781 - Archer C50 v4 Mac80211 Looses Internet Access after 20’+ Away from Router But Maintains Connection #8891
Supply the following if possible:
Steps to reproduce:
config wifi-device 'radio0'
config wifi-iface 'default_radio0'
config wifi-device 'radio1'
config wifi-iface 'default_radio1'
htmode 'HT40' No change in results
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The bug affects me and one more person as well (OP here and there are the same), [[https://forum.openwrt.org/t/archer-c50-v4-mac80211-looses-internet-access-after-20-away-from-router-but-maintains-connection/53575/13|see]].
I had the problem with no extra packages installed, right after flashing 19.0.7.
I'm 99% sure there is a small improvement by setting:
Thanks for your time.
I have some additional info.
When I restart the 2.4GHz interface there are two error messages in the system log that do not appear when restarting the 5GHz interface:
Investigating the first error
If I re-run the the first command on the terminal I get:
I could not find any information about the error code on the web.
The output of of "wl list" is: https://pastebin.com/raw/66UYQyvK
Some interesting things to notice are:
Investigating the second error
The contents of the file " /var/run/hostapd-phy0.conf" are here: https://pastebin.com/raw/rwQrWabE
Some interesting things to note are:
3.On the Web GUI "Isolate clients" is not set.
Finally I set the kernel log leave to 7 (debug, highest) and dmesg gave a normal output after restarting phy0(2.4GHz)
I think I found the problem but I still do not how to fix it.
This gives me improvements on the receiving power. When doing a scan from the router I can now find networks that I couldn't before.
On the other hand I'm not able to change the transmission power. I tried many values, large and small.
Those commands do not return any error and return 0 to the shell. Yet the transmission power of the interface remains unchanged (1.0 dBm):
I found [[https://dev.archive.openwrt.org/ticket/20369|this ticket]] reporting the same problem with a different router that uses same driver (mt76). The driver has had problems setting power before.
Update: Of course 90% of the links on the linked ticket are broken and now I'm in the dark.
I'm also having problems with low range on 2.4 GHz. I'm using EU 4.2 HW version and self-built 19.07 from 2020-02-25. However, for me txpower is shown as 20 dB which is the allowed maximum (with 0 dB antenna_gain!).
Has anybody tested this with master?
You can improve antenna gain with:
This improves the receiving signal strength considerably. With this I'm able to see networks that I couldn't before.
Unfortunately we still do not have any replies on the kernel bug report.
What you do with antenna_gain here is just reducing the txpower:
So, having better receiving quality seems to be a result of the reduced transmitting power here, and thus isn't really helpful after all ...
There's a proposed fix on the forum: https://forum.openwrt.org/t/archer-c50-v4-mac80211-looses-internet-access-after-20-away-from-router-but-maintains-connection/53575/49