On Tue, Apr 05, 2022 at 12:40:21PM +0200, Massimo B. wrote:
> On Mon, 2022-03-28 at 13:34 +0300, Laurent Pinchart wrote:
>
> > Could you send the output of `lsusb -v -d 0408:2090` (if possible
> > running as root) ?
[snip]
> > The audio interface causes issues, it seems it crashed the webcam
> > firmware. Could you try blacklisting the snd-usb-audio module and see if
> > video then works ?
>
> Yes, that makes the video part work again.
So this confirms it's a USB audio issue. It may be possible to work
around it in the snd-usb-audio driver, but that's beyond my area of
expertise. You may want to contact the alsa-devel mailing list.
> However it is not sufficient anymore to just disable the audio via udev rule:
>
> ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="0408", ATTRS{idProduct}=="2090", ATTR{bInterfaceClass}=="01", ATTR{authorized}="0"
>
> Some while ago this was working to have the video part usable.
I'd be surprised if it wasn't possible to achieve a similar result with
a recent version of udev, but the way to do so may have changed. I
haven't tried it personally, so maybe contacting the udev developers for
support could help ?
> Blacklisting snd_usb_audio works, but I need that module to have at least
> another usb microphone doing the audio part.
--
Regards,
Laurent Pinchart
