Hi Sebastian, On 04/05/18 19:45, Sebastian Reichel wrote: > Hi, > > I just got the following error message every ms with 4.17-rc3 after > upgrading to for first ~192 seconds after system start (Debian > 4.17~rc3-1~exp1 kernel) on my Thinkpad X250: > >> uvcvideo: Failed to query (GET_MIN) UVC control 2 on unit 1: -32 (exp. 1). I have submitted a patch to fix this ... (and I thought it would have got in by now ... so I'll chase this up) Please see : https://patchwork.linuxtv.org/patch/48043/ and apply the patch to bring your system logs back to a reasonable state :D Laurent, Mauro, This is the second bug report I've had on this topic. Can we aim to get this patch merged please? > I see /dev/video0 and /dev/video1. The first one seems to be > functional. The second one does not work and does not make > sense to me (the system has only one webcam). I did not try to > bisect anything. Here is some more information, that might > be useful: There are two device nodes now, as one is provided to output meta-data or such. >> sre@earth ~ % mpv /dev/video1 >> Playing: /dev/video1 >> [ffmpeg/demuxer] video4linux2,v4l2: ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device >> [lavf] avformat_open_input() failed >> Failed to recognize file format. >> sre@earth ~ % udevadm info /dev/video0 >> P: /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/video4linux/video0 >> N: video0 >> E: DEVNAME=/dev/video0 >> E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/video4linux/video0 >> E: MAJOR=81 >> E: MINOR=0 >> E: SUBSYSTEM=video4linux >> sre@earth ~ % udevadm info /dev/video1 >> P: /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/video4linux/video1 >> N: video1 >> E: DEVNAME=/dev/video1 >> E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/video4linux/video1 >> E: MAJOR=81 >> E: MINOR=1 >> E: SUBSYSTEM=video4linux >> sre@earth ~ % lsusb -d 04ca:703c >> Bus 001 Device 004: ID 04ca:703c Lite-On Technology Corp. > > -- Sebastian Regards Kieran
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