Webcam not working properly

[CGH]

Hi everyone,

After installing testing on my Thinkpad T495 I've been having issues with my webcam. The cycle goes like this: first it doesn't work at all (lsusb will not even list it), then it will work but at a very low resolution (160x120) and finally it works perfectly. After every apt upgrade I cross my fingers waiting for it to not go back to issue 1 or 2.

After several days without the camera working I am back at phase two: the camera is recognized but the resolution is too low. I'm using the latest kernel

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~$ uname -r
5.10.0-7-amd64

This is the webcam information

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~$ inxi -Gxx
Graphics:
  Device-1: AMD Picasso vendor: Lenovo driver: amdgpu v: kernel 
  bus ID: 06:00.0 chip ID: 1002:15d8 
  Device-2: IMC Networks Integrated Camera type: USB driver: uvcvideo 
  bus ID: 4-2.1:4 chip ID: 13d3:56a6 
  Display: x11 server: X.Org 1.20.11 driver: loaded: amdgpu,ati 
  unloaded: fbdev,modesetting,vesa resolution: 1920x1080~60Hz s-dpi: 96 
  OpenGL: renderer: AMD Radeon Vega 10 Graphics (RAVEN DRM 3.40.0 
  5.10.0-7-amd64 LLVM 11.0.1) 
  v: 4.6 Mesa 20.3.4 direct render: Yes

But instead of capturing at 1920x1080, I only have 160x120

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~$ v4l2-ctl --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
	Type: Video Capture

	[0]: 'YUYV' (YUYV 4:2:2)
		Size: Discrete 160x120
			Interval: Discrete 0.100s (10.000 fps)

I tried installing/re-installing/removing and installing again firmware-amd-graphics , libv4l-0, cheese, guvcview and rebooting, but nothing works. The camera wasn't even being recognized until the last update (the packages being updated were redshift ,libcurl3-gnutls ,vlc-l10n ,grub-common ,python3-pil ,libfuse3-3 ,libvlccore9 ,vlc-plugin-qt ,libcurl4 ,redshift-gtk ,grub-efi-amd64-bin ,vlc-data ,vlc-plugin-notify ,vlc-plugin-video-output ,vlc-plugin-samba ,vlc-plugin-fluidsynth ,grub-efi-amd64-signed ,vlc-plugin-skins2 ,grub2-common ,vlc-plugin-video-splitter ,libvlc5 ,apache2-bin and fuse3.)

Any suggestion on what I could try now?

Saludos!

[CGH]

an update:

the camera is no linger being recognized:

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~$ inxi -Gxx
Graphics:
  Device-1: AMD Picasso vendor: Lenovo driver: amdgpu v: kernel 
  bus ID: 06:00.0 chip ID: 1002:15d8 
  Display: x11 server: X.Org 1.20.11 driver: loaded: amdgpu,ati 
  unloaded: fbdev,modesetting,vesa resolution: 1920x1080~60Hz s-dpi: 96 
  OpenGL: renderer: AMD Radeon Vega 10 Graphics (RAVEN DRM 3.40.0 
  5.10.0-7-amd64 LLVM 11.0.1) 
  v: 4.6 Mesa 20.3.4 direct render: Yes

I haven't updated/installed anything since my last post.

[arochester]

Which Kernel are you using?

Arch Linux reports

Warning: Currently this device does not work well under Linux. Please see known issues for unresolved AMDGPU drm bugs in the LTS 5.4.x kernel and more recent kernels such as 5.12.x.

Source - https://wiki.archlinux.org/title/Lenovo_ThinkPad_T495

[CGH]

Hi, as pointed at the beginning:

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~$ uname -r
5.10.0-7-amd64