Camera Not Recognized in Ubuntu 20.04

erik

8/7/24, 5:59 PM

My laptop has an integrated web cam. It worked in previous versions of ubuntu. Under 20.04, when I run cheese, it says "No device found". Here is the output of v4l2-ctl --list-devices:

erik@laptop:~$ v4l2-ctl --list-devices
Cannot open device /dev/video0, exiting.

How can I troubleshoot this?

Edit: I added myself to the video group, this did not fix the problem.

Edit #2: As requested in comments:

erik@laptop:~$ sudo /bin/ls -l /dev/video*
/bin/ls: cannot access '/dev/video*': No such file or directory

erik@laptop:~$ sudo lshw -class video
  *-display                 
       description: VGA compatible controller
       product: WhiskeyLake-U GT2 [UHD Graphics 620]
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=i915 latency=0 mode=1920x1080 resolution=1920,1080 visual=truecolor xres=1920 yres=1080
       resources: iomemory:600-5ff iomemory:400-3ff irq:146 memory:6000000000-6000ffffff memory:4000000000-400fffffff ioport:4000(size=64) memory:c0000-dffff
   
erik@laptop:~$ sudo v4l2-ctl --list-devices
Cannot open device /dev/video0, exiting.

Edit #3:

Output of lsusb:

erik@laptop:~$ lsusb | grep -i camera
Bus 001 Device 003: ID 04f2:b649 Chicony Electronics Co., Ltd Chicony USB2.0 Camera

Partial output of sudo journalctl -b 0:

Aug 07 22:37:59 laptop kernel: usb 1-7: new high-speed USB device number 3 using xhci_hcd
Aug 07 22:37:59 laptop kernel: usb 1-7: New USB device found, idVendor=04f2, idProduct=b649, bcdDevice=54.03
Aug 07 22:37:59 laptop kernel: usb 1-7: New USB device strings: Mfr=2, Product=1, SerialNumber=0
Aug 07 22:37:59 laptop kernel: usb 1-7: Product: Chicony USB2.0 Camera
Aug 07 22:37:59 laptop kernel: usb 1-7: Manufacturer: Sonix Technology Co., Ltd.
Aug 07 22:37:59 laptop kernel: usb 1-10: new full-speed USB device number 4 using xhci_hcd
Aug 07 22:37:59 laptop kernel: usb 1-10: New USB device found, idVendor=8087, idProduct=0025, bcdDevice= 0.02
Aug 07 22:37:59 laptop kernel: usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Aug 07 22:37:59 laptop kernel: hid: raw HID events driver (C) Jiri Kosina
Aug 07 22:37:59 laptop kernel: usbcore: registered new interface driver usbhid
Aug 07 22:37:59 laptop kernel: usbhid: USB HID core driver
Aug 07 22:37:59 laptop kernel: input: PixArt USB Optical Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/0003:093A:2510.>
Aug 07 22:37:59 laptop kernel: hid-generic 0003:093A:2510.0001: input,hidraw0: USB HID v1.11 Mouse [PixArt USB Optical Mouse] on us>

103

0 + 8

camera

20.04

waltinator

8/7/24, 7:28 PM

Are you a member of the `video` group? `id` will show which groups yoa have membership in.

erik

8/7/24, 8:46 PM

Thank you for getting back to me. I was not a member of the `video` group, I added myself, this did not fix the problem. The output of `v4l2-ctl --list-devices` remains unchanged.

waltinator

8/7/24, 9:12 PM

You must logout/login or read `man newgrp` to make group changes take effect.

erik

8/8/24, 7:03 AM

I did. I logged out and logged in, and the `id` command now confirms that I belong to group `video`. The problem persists and the output of `v4l2-ctl --list-devices` remains unchanged. Thanks for your response.

waltinator

8/8/24, 4:03 PM

Try `sudo /bin/ls -l /dev/video*` and `sudo lshw -class video` and `sudo v4l2-ctl --list-devices`. Please [edit] your question to add whatever information you get. Do not use Add Comment.

erik

8/8/24, 7:40 PM

Done, thank you.

waltinator

8/8/24, 11:30 PM

Look at your system startup log (watch your kernel discover the hardware) with the terminal command `sudo journalctl -b 0`. Read `man journalctl`.

erik

8/9/24, 7:38 AM

I grabbed what appears to be the relevant output from `sudo journalctl -b 0` and added it to my question.

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