v4l2-ctl --list-devices
produces
USB camera (usb-0000:00:14.0-11):
/dev/video0
Only web-based cam tests with Firefox do work (I see the video feed just
fine). Cheese and Wemcamoid claim "no device found", neither before,
during, or after the online cam test.
uname -a
Linux Neko 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021 x86_64
x86_64 x86_64 GNU/Linux
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-signed in Ubuntu.
https://bugs.launchpad.net/bugs/1881757
Title:
webcam is detected but not working with kernel 5.4.0.33
Status in linux-signed package in Ubuntu:
Fix Released
Bug description:
webcam is detected not working under kernel 5.4.0.33 and 5.4.0.31 . The
webcam is functional with kernels 5.0 and 5.6.15 .
-usb:1
description: Video
product: USB 2.0 Web Camera
vendor: Alcor Micro, Corp.
physical id: 2
bus info: usb@1:1.2
version: 0.08
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=200mA
speed=480Mbit/s
susb; lsb_release -a; uname -a
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1d0b:0021 HAN HUA CABLE & WIRE TECHNOLOGY (J.X.) CO.,
LTD.
Bus 001 Device 003: ID 058f:5608 Alcor Micro Corp.
Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04 LTS
Release: 20.04
Codename: focal
Linux afsal-Excelance 5.4.0-33-generic #37-Ubuntu SMP Thu May 21 12:53:59 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
more info : https://answers.launchpad.net/ubuntu/+question/691070
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