XPost: linux.debian.bugs.dist   
   From: post@ralfj.de   
      
   Dear Uwe,   
      
   > On Tue, Dec 02, 2025 at 06:36:38PM +0100, Ralf Jung wrote:   
   >>> If you reliably can reproduce the issue then (although I realize that   
   >>> each testing step is time consuming), I would suggest to start a   
   >>> bisect.   
   >>   
   >> Unfortunately I cannot reproduce it alone, I need someone else to be in the   
   >> Zoom room. Also, I only have that webcam in the office, and I shouldn't   
   >> spend hours of my employer's time on bisects. ;)  I guess I could take it   
   >> home over a weekend or so, but I'd still need a way to reproduce the issue   
   >> alone, and find a weekend day where I have nothing else to do.   
   >   
   > I would try to wireshark the USB traffic. I guess that results in quite   
   > some amount of logs, but someone who is more familiar with USB and   
   > webcams might spot the relevant USB transfer that triggers the issue.   
      
   I think I managed to capture USB traffic from around the time when the webcam   
   starts to show this issue:   
   - I joined the zoom room and activated the camera   
   - I started capturing   
   - Someone else joined the zoom   
   - The camera changed its "mode" and started flickering   
   - I stopped capturing   
      
   Then I filtered the result to only include the packets for the camera. I hope I   
   did this correctly. I uploaded the result to:   
      
      
   Kind regards,   
   Ralf   
      
   >   
   > And even if that doesn't help to immediately spot the problem it might   
   > help to reproduce the problem and thus make a bisection possible.   
   >   
   > Best regards   
   > Uwe   
      
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