Comment # 6
on bug 106228
from jian-hong@endlessm.com
Apply "[PATCH] drm/amdgpu: Read back max backlight value at boot" to Linux 4.18.0-rc6 kernel. I disable all of the brightness setting applications, including masking systemd-backlight service and than reboot. "cat /sys/class/backlight/amdgpu_bl0/brightness" before set brightness manually again and it reads back 255 (the maximum brightness). If I unmask systemd-backlight service and than reboot for test, "cat /sys/class/backlight/amdgpu_bl0/brightness" before set brightness manually again and it reads back the brightness which is saved before last reboot.
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