Bug#930855: udev: USB Camera seen as multiple devices

[Seba Kerckhof]

Package: udev
Version: 241-5
Severity: normal

Dear Maintainer,

Under Debian 10 rc1, when I plug in my USB camera (the very common logitech
c930e), 2 devices are added (e.g. /dev/video0 and /dev/video1).

v4l-info works on /dev/video0, but fails on /dev/video1
(VIDIOC_G_FMT(VIDEO_CAPTURE): Invalid argument). When I try to access the
device using gstreamer it tells me that /dev/video1 is not a capture device.

In stretch I don't see this behavior.

Attached are syslog, dmesg, v4l-info for both devices, udevadm for both
devices, lsusb, lspci.

Let me know if any other logs can be of help.



-- Package-specific info:

-- System Information:
Debian Release: 10.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages udev depends on:
ii  adduser       3.118
ii  dpkg          1.19.7
ii  libacl1       2.2.53-4
ii  libblkid1     2.33.1-0.1
ii  libc6         2.28-10
ii  libkmod2      26-1
ii  libselinux1   2.8-1+b1
ii  libudev1      241-5
ii  lsb-base      10.2019051400
ii  systemd-sysv  241-5
ii  util-linux    2.33.1-0.1

udev recommends no packages.

udev suggests no packages.

Versions of packages udev is related to:
ii  systemd  241-5

-- no debconf information
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