Hi, can you please attach output of: lsusb -vd 05c8:0403 > lsusb also reload uvcvideo module with: sudo rmmod uvcvideo && sudo modporbe uvcvideo trace=0xfff
capture video until it brakes and attach dmesg to email as well, please send complete dmesg not just last part with error. You may gzip it. Regards, Alexey On 14.08.2011 10:20, overclocked wrote: > Dear ladies and gentlemen. > > As I wrote before, the following webcam is NOT working on my HP 4720s > laptop: > > 05c8:0403 Cheng Uei Precision Industry Co., Ltd (Foxlink). > > I have installed (today) last version of the uvc driver. (from git clone > git://linuxtv.org/media_build.git). > > When I try to test it with 'guvcview' it works about 20 secons only. > Then video freezes, webcam LED turns off. > > guvcview writes the following to console output: > > libv4l2: error dequeuing buf: No such device > VIDIOC_DQBUF - Unable to dequeue buffer : No such device > Error grabbing image > libv4l2: error dequeuing buf: No such device > VIDIOC_DQBUF - Unable to dequeue buffer : No such device > Error grabbing image > libv4l2: error dequeuing buf: No such device > VIDIOC_DQBUF - Unable to dequeue buffer : No such device > Error grabbing image > libv4l2: error dequeuing buf: No such device > VIDIOC_DQBUF - Unable to dequeue buffer : No such device > Error grabbing image > ... > > If I restart guvcview, it just shows same errors and black screen > instead of video. > > BUT!!! If I restart the driver using: > > $ sudo modprobe -r uvcvideo > $ sudo modprobe uvcvideo > > video in guvcview works again!!! (for about 20 seconds). > > So I think that it's definitely a problem with UVC driver. > > You have already answered me, that it works on HP Mini 5103 netbook. But > if it works on your system, it does not always mean that it will work on > others. > > Thank You in advance, > Kind Regards, > _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
