Screen brightness goes max after wake up from suspension

[Gabryoo3]

Describe the bug

After the PC wakes up from suspend, the brightness goes to max despite the brightness slider stays at 30%. As I adjust the brightness, it goes to the 30% level I set. This happens also in GDM, but didn't happen in Bluefin GTS (Fedora 39)

20240621_195246.mp4

What did you expect to happen?

Screen brightness stay at normal level after wake up

Output of rpm-ostree status

State: idle
AutomaticUpdates: stage; rpm-ostreed-automatic.timer: no runs since boot
Deployments:
  ostree-image-signed:docker://ghcr.io/ublue-os/bluefin-dx:latest
                   Digest: sha256:5f72875e1cac36e5bdf0581a79f53a5d027bf82022e9c8d2cd75bf9facd25475
                  Version: 40.20240621.0 (2024-06-21T16:55:25Z)
                     Diff: 21 upgraded

● ostree-image-signed:docker://ghcr.io/ublue-os/bluefin-dx:latest
                   Digest: sha256:7f4c59456d6bb1df3d2a54f83f7359f1ca7f6dbf119c876e9099b0b3d266bfe3
                  Version: 40.20240620.0 (2024-06-20T16:54:17Z)

  ostree-image-signed:docker://ghcr.io/ublue-os/bluefin-dx:gts
                   Digest: sha256:9e944b7b6b97c4e943f946fb2f56a3804685143dc7f8ce828941f45f1478c1d7
                  Version: 39.20240525.0 (2024-05-25T16:52:09Z)

Output of groups

gabry wheel

Extra information or context

I had some confront on Reddit. Seems like this could be a kernel issue (6.9.4)

[Xuerian]

I'm seeing something similar over on Bazzite - after monitors have turned off and turn back on again, one monitor returns to 80% brightness regardless of what I have set in the brightness widget or on the monitor itself.
Happens with just monitor-off though, no suspend required. Dimming is disabled.

State: idle
Deployments:
  ostree-image-signed:docker://ghcr.io/ublue-os/bazzite:stable
                   Digest: sha256:49ffc8de563e558d45b8606ac47686cdda4e518ab392a796e043c7d3628bf2c2
                  Version: 40.20240723.0 (2024-07-23T21:14:29Z)
            LocalPackages: lact-0.5.5-0.x86_64

● ostree-image-signed:docker://ghcr.io/ublue-os/bazzite:stable
                   Digest: sha256:17a1b630295e2c4a6c8b6c0113369f0bdf9fd3d2954bfb156a6ca92ba41e9341
                  Version: 40.20240723.0 (2024-07-23T21:14:29Z)
            LocalPackages: lact-0.5.5-0.x86_64

  ostree-image-signed:docker://ghcr.io/ublue-os/bazzite:stable
                   Digest: sha256:17a1b630295e2c4a6c8b6c0113369f0bdf9fd3d2954bfb156a6ca92ba41e9341
                  Version: 40.20240723.0 (2024-07-23T21:14:29Z)

[wengtad]

Exactly having the same issue on bluefin-dx, I had tried for close lid, lock screen, and idle til screen off. After wake the screen up and log back in will have this problem.

State: idle
AutomaticUpdates: stage; rpm-ostreed-automatic.timer: last run 19h ago
Deployments:
● ostree-image-signed:docker://ghcr.io/ublue-os/bluefin-dx:gts
                   Digest: sha256:11ed3c5a83c8f5509ed96acb52aba060c627624d7edb53467c25683b5c82882e
                  Version: 39.20240928.0 (2024-09-29T05:56:51Z)

  ostree-image-signed:docker://ghcr.io/ublue-os/bluefin-dx:gts
                   Digest: sha256:e011c2c866763ab4fe1b9c92b2a7d650e34b8702d495483cf640fb918442a76b
                  Version: 39.20240928.0 (2024-09-29T05:56:51Z)

[dosubot]

Hi, @Gabryoo3. I'm Dosu, and I'm helping the bluefin team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• Screen brightness resets to maximum after waking from suspension.
• Brightness slider inaccurately shows 30% despite the reset.
• Issue is specific to GDM and not present in Bluefin GTS (Fedora 39).
• Other users have reported similar issues across different systems.
• Potential link to kernel version 6.9.4.

Next Steps:

• Is this issue still relevant to the latest version of the bluefin repository? If so, please comment to keep the discussion open.
• If no further activity occurs, this issue will be automatically closed in 14 days.

Thank you for your understanding and contribution!