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 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: > 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
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