On Sat, 2020-11-07 at 17:23 +0100, Gregor Hlawacek wrote:
> On Thu, 2020-11-05 at 11:19 +0200, Laurent Pinchart wrote:
> > Hi Gregor,
> > 
> > On Thu, Nov 05, 2020 at 08:41:27AM +0100, Gregor Hlawacek wrote:
> > 
> > [snip]
> > 
> > > Hi Mauro and Laurent
> > > 
> > > @Mauro:
> > > 
> > > I think there is a confusion, which might be my fault as I talked
> > > about
> > > a chicony cam in the external monitor. The chicony cam that shows
> > > up as
> > > video0/1 is my internal laptop camera which is working fine. The
> > > problematic one is the sunplusIT camera which has a chicony usb
> > > identifier (0412). This is connected to video2-5 and also the one
> > > for
> > > which I reported the above information.
> > > 
> > > @Laurent:
> > > 
> > > lsusb -v -d 0412:612b:
> > 
> > [snip]
> > 
> > Thank for the information. Nothing strikes me as weird. Could you
> > 
> > - Set the uvcvideo trace parameter to 0xffff:
> > 
> >   sudo echo 0xffff > /sys/module/uvcvideo/parameters/trace
> > 
> > - Unplug and replug the monitor
> > - Open the video devices in turn with v4l2-ctl (use the video
> > device
> >   nodes /dev/video* directly, not the by-id links)
> > - Send send the output of 'sudo dmesg'
> > 
> > You can clear the kernel log with 'sudo dmesg -c' before doing so
> > to
> > avoid including unrelated data (or just strip it from the dmesg
> > output
> > manually when copying it to an e-mail).
> > 
> 
> Hi Laurent
> 
> sorry for the delay but I had to many other things going on during
> the
> end of this week. Here is the output attached.
> 
> Have a nice weekend
> 
> Gregor
> 
Hi Laurent and Mauro

could you make any sense out of the dmesg log and the other input I've
provided?

Gregor