connect external USB audio interface to Windows HVM: vchan timeout

[nic4123]

Qubes OS version (e.g., R3.1):

R3.2rc3

Actual behavior:

[ndm@dom0 ~]$ qvm-usb
sys-net :2-1.6    04f2:b217 Chicony_Electronics_Co.__Ltd._Integrated_Camera
sys-net:3-1.1     0582:0074 Roland_EDIROL_UA-25
[ndm@dom0 ~]$ qvm-usb -a w7 sys-net:3-1.1
ERROR: Device attach failed: vchan connection timeout (or error)
[ndm@dom0 ~]$

[marmarek]

This isn't error I'd expect. But anyway qvm-usb does not support Windows
VMs, yet.

Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

[marmarek]

@omeg it looks like handling non-existing services is broken. In such a case, qrexec-agent should connect back data vchan and just send non-zero exit code (Linux use 127 for non-existing commands).

[nic4123]

Can i have audio on working on Windows HVM if i run USB external audio interface through PCI e.g.: "qvm-pci -w7 00:1a.0"?

[marmarek]

In theory yes, in practice, it is broken currently: #1659

[omeg]

Fixed by QubesOS/qubes-core-agent-windows@54d8b06

[omeg]

Well, the original problem isn't fixed...

[tonsimple]

Just decided to leave a little comment here https://sourceforge.net/p/usbip/discussion/418507/thread/86c5e473/ in case someone specifically needs to pass a printer to a windows VM and is in the process of pulling their hairs out :)

It's doable using USBIP windows client from here and Fedora-24's usbip module

It does not work for webcams and flash drives however (something mysteriously broken in USBIP, either kernel module in fedora or windows client)
Fedora's printer sharing must work, but printer must be bound to usbip driver before printer sharing (cusp) starts up (so it must be called from rc.local early on)
Also, bind first then start usbipd -D

(of course, you'd need to allow networking between your usb-vm and windows vm...)

EDITED TO ADD:
using Debian 8 allowed to share a usb webcam via usbip too (also, Debian's usbip is all kinds of less quirky)
Haven't tested with usb audio tho
#2597 (comment)

[andrewdavidwong]

This issue is being closed because:

• This issue has the "Release 3.2 updates" milestone.
• Qubes OS 3.2 recently reached end-of-life (EOL).
• This issue has not been updated in over a year.

If anyone believes that this issue should be reopened, please let us know in a comment here.