I cannot use my (good) Logitech 922 USB Webcam

User Support Hardware Issues
8
  • Could you check the kernel version of the Linux Mint 20 test?
    The Linux Mint 20 was booted from the ISO-Image as supplied as an installer from the linuxmint-Homepage. This is the standard installation or Live-ISO:

uname -a:
Linux mint 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

cat /etc/os-release:
NAME=“Linux Mint”
VERSION=“20 (Ulyana)”
ID=linuxmint
ID_LIKE=ubuntu
PRETTY_NAME=“Linux Mint 20”
VERSION_ID=“20”
…
VERSION_CODENAME=ulyana
UBUNTU_CODENAME=focal

  • What is your kernel for dom0, sys-usb, the standalone VM videoconferences?
    uname -r: dom0: 4.19.155-1pvops.qubes.x86_64
    uname -r sys-usb: 4.19.155-1pvops.qubes.x86_64
    uname -r Standalone-VM: 4.19.155-1pvops.qubes.x86_64 (debian 10)

  • Could you send us the lsusb output from

Linux Mint 20:
Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0951:1666 Kingston Technology DataTraveler 100 G3/G4/SE9 G2
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 006: ID 8087:07dc Intel Corp.
Bus 002 Device 005: ID 045e:0040 Microsoft Corp. Wheel Mouse Optical
Bus 002 Device 004: ID 046a:b090 Cherry GmbH Keyboard
Bus 002 Device 002: ID 046d:085c Logitech, Inc. C922 Pro Stream Webcam
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dom0:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 8087:07dc Intel Corp.
Bus 001 Device 004: ID 045e:0040 Microsoft Corp. Wheel Mouse Optical
Bus 001 Device 003: ID 046a:b090 Cherry GmbH
Bus 001 Device 002: ID 046d:085c Logitech, Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

sys-usb:
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

VM:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  • Could you send us the qvm-usb list --verbose --all output from dom0?

qvm-usb list --verbose --all
BACKEND:DEVID DESCRIPTION USED BY
(empty)

  • Could you, unplug the webcam, on dom0, launch the sudo dmesg -Tw command, plug the webcam and send us the added lines in the dmesg logs

[Fri Nov 13 19:41:42 2020] usb 1-1: new high-speed USB device number 7 using xhci_hcd
[Fri Nov 13 19:41:44 2020] usb 1-1: New USB device found, idVendor=046d, idProduct=085c, bcdDevice= 0.16
[Fri Nov 13 19:41:44 2020] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=1
[Fri Nov 13 19:41:44 2020] usb 1-1: Product: C922 Pro Stream Webcam
[Fri Nov 13 19:41:44 2020] usb 1-1: SerialNumber: 5CBED16F
[Fri Nov 13 19:41:44 2020] uvcvideo: Found UVC 1.00 device C922 Pro Stream Webcam (046d:085c)
[Fri Nov 13 19:41:44 2020] input: C922 Pro Stream Webcam as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/input/input18