[amdgpu] Mouse cursor theme is grey instead of black

[Chase Clark]

- this is a fresh install of the latest Ubuntu 24.04

- I have fully updated the debs and snaps

- my mouse cursor is grey when it should be black

- the strange thing is the cursor looks normal when I boot off the USB and then looks grey on first boot

- even more strange is when I went to screenshot the cursor for this bug report, it looked normal in the screenshot

- For graphics I have AMD 6600XT

- I will try in X11 as well to see if this is a Wayland-only issue

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: yaru-theme-gtk 22.04.5
ProcVersionSignature: Ubuntu 6.2.0-39.40~22.04.1-generic 6.2.16
Uname: Linux 6.2.0-39-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 9 21:57:08 2024
InstallationDate: Installed on 2024-01-10 (0 days ago)
InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: yaru-theme
UpgradeStatus: No upgrade log present (probably fresh install)

[Chase Clark (chaseclark)]

On x11 it is more normal looking, so this may be Wayland related.

Has the Yaru cursor theme been updated recently to add more grey in it or am I misremembering how it looked in the past?

[Daniel van Vugt (vanvugt)]

Sounds like this might be an amdgpu kernel issue. Does it help if you add this to /etc/environment;

  MUTTER_DEBUG_FORCE_KMS_MODE=simple

and reboot?

[Daniel van Vugt (vanvugt)]

Also, while the problem is visible on screen please run:

  sudo apt install drm-info
  drm_info > drminfo.txt

and attach the resulting text file here.

[Chase Clark (chaseclark)]

Here is drminfo.txt output with the broken cursor before I made the Mutter changes.

[Chase Clark (chaseclark)]

setting MUTTER_DEBUG_FORCE_KMS_MODE=simple did not seem to change anything.

[Daniel van Vugt (vanvugt)]

Thanks. Can you provide a photo of the problem? Also it might be worth testing the DMZ-Black cursor theme in GNOME Tweaks.

[Chase Clark (chaseclark)]

This is the best photo I could get.

The cursor on the right is my actual cursor, while the one on the left is a screenshot of the cursor.

[Chase Clark (chaseclark)]

The DMZ-Black cursor is also grey but only on its' right side.

I will attach a horrendous photo but its the best I could do with my iPhone and a computer screen.

The cursor on the left is my actual cursor and the right is a screenshot of the DMZ-Black cursor next to a black box.

If you mess with the zoom on the image you can see that the left one appears to have more grey pixels.

[Daniel van Vugt (vanvugt)]

Zooming in on the cursor images in GIMP I find they do contain gradients - both Yaru and DMZ-Black. Therefore some greyness is correct.

I think the remaining bug here is that either the kernel (amdgpu) or mutter is under-saturating the cursor plane with an alpha component below 1.0. That's why I asked for drm_info because the blending is controllable on some drivers, but seemingly not on amdgpu.

[Daniel van Vugt (vanvugt)]

See also:
https://gitlab.freedesktop.org/drm/amd/-/issues/2803
https://gitlab.freedesktop.org/drm/amd/-/issues/1513

[Daniel van Vugt (vanvugt)]

Sounds like it was fixed in kernels 6.6 and 6.5.4

[Chase Clark (chaseclark)]

Alright, thanks for looking into this!

[Chase Clark (chaseclark)]

Can confirm the issue is fixed when running 6.6.11

[Ernst Persson (ernstp)]

Oh, the Ubuntu 6.5 kernel is still based on 6.5.3 ?

[Daniel van Vugt (vanvugt)]

Seems like it, at least for jammy:

grep -H '6\.5\.' /boot/config-6.5.*