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abm_level can be set with panel_power_savings for an OLED display

Brief summary of the problem:

With kernel 6.9 the /sys/class/drm/card1-eDP-1/amdgpu/panel_power_savings is available and the power-profiles-daemon (or something else) changes it causing weird colors on the OLED display. This affects the balanced and power-saving modes.

Hardware description:

  • CPU: AMD Ryzen™ 7 6800U
  • GPU: 33:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt [Radeon 680M] [1002:1681] (rev c1)
  • System Memory: 16GB
  • Display(s): | 14" | 2.8K (2880x1800) | Multi-touch | OLED | 400nits | Glossy | 16:10 | 100,000:1 | 100% DCI-P3 | 90Hz (Max) | 87.5°/87.5°/87.5°/87.5° | Above 90% screen-to-body ratio, Dolby® Vision, TÜV Low Blue Light (Hardware), VESA DisplayHDR™ True Black 500
  • Type of Display Connection: eDP

System information:

  • Distro name and Version: Fedora 40
  • Kernel version: 6.9.0-rc7+
  • Custom kernel: latest kernel from Torvalds tree