XPost: linux.debian.bugs.dist   
   From: laurent.pinchart@ideasonboard.com   
      
   On Mon, Jan 05, 2026 at 04:29:24PM +0100, Ricardo Ribalda wrote:   
   > Hi Ralf   
   >   
   > Thanks for the bisect and the report.   
   >   
   >   
   > The patch to remove noprod parameter has been queued for 6.20 :S so we   
   > should look into a more permanent fix soon.   
   >   
   > When you say zoom, do you mean the desktop version of zoom (   
   > https://zoom.us/download?os=linux ) or the web version   
   > I would assume that it is the zoom app, that is ignoring the "error"   
   > flag from the frames and showing them to the users. Can you confirm   
   > that? Hopefully we can reach zoom and they can fix it.   
      
   Should we revert the nodrop removal in the meantime ?   
      
   > Now about the error flag. I have given a fast look at your usb trace   
   > and have only seen 4 frames with "error bits" [1]. Can you add more   
   > tracing?   
   > Do something like:   
   > rmmod uvcvideo   
   > modprobe uvcvideo trace=0xffffffff   
   >   
   > Then start zoom, trigger the error and share the content of your   
   > dmesg. It should contain an explanation of why the driver thinks that   
   > the frames are invalid.   
   >   
   > Thanks!   
   >   
   > [1] I used this filter in wireshark: usb.iso.data[1]!=0x0d &&   
   > usb.iso.data[1]!=0x0c && usb.iso.data[1]!=0x0f &&   
   > usb.iso.data[1]!=0x0e && usb.addr == "3.34.1"   
      
   --   
   Regards,   
      
   Laurent Pinchart   
      
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