Hi Andrej, On Wednesday 18 February 2009 04:26:10 Andrej Podzimek wrote: > Hello, > > I switched to kernel 2.6.28.6 (vanilla) hoping that my camera could work > this time. This is what I got: > > usb 1-2.2: new high speed USB device using ehci_hcd and address 9 > usb 1-2.2: configuration #1 chosen from 1 choice > v4l1_compat: module is already loaded > videodev: exports duplicate symbol video_unregister_device (owned by > kernel) usbcore: registered new interface driver snd-usb-audio > v4l1_compat: module is already loaded > videodev: exports duplicate symbol video_unregister_device (owned by > kernel) uvcvideo: Found UVC 1.00 device <unnamed> (046d:0994)
[snip] > Feel free to ask for more debug info. > > I guess snd-usb-audio needs some options or quirks here. KMix shows a new > USB audio device, but the first attempt to change its volume blocks the > mixer channel. Audacity recorded about half a second of weird noise from > the webcam before the sound input got interrupted for some reason. > > Tried the old workaround that forces snd-usb-audio to be loaded before > uvcvideo. The problem seems to persist and the error messages are similar. > > Plugging and unplugging the camera multiple times seems to crash the whole > USB controller. Even my keyboard and mouse stopped working. Fortunately, my > laptop's internal keyboard still works. ;-) Error -71 was reported. > (Excessive electromagnetic noise in the cable...? That's weird.) > > Should I report this to the kernel bugzilla? If you want me to carry out > more webcam experiments, I'm ready to help. It seems you mixed a uvcvideo.ko module coming from a linuxtv.org tree with the videodev stock modules coming from your kernel. This isn't allowed and won't work. linuxtv.org Mercurial trees come with their own version of the video4linux subsystem. You will need to disable v4l in your kernel and use the modules provided by the uvcvideo tree. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
