Each and every time I log into my session, the screen brightness is set to a different level. I do not have any obvious setting for this—i.e., “Dim Screen” is off—so I’m not sure where to even look to debug, so any help is appreciated.
Perhaps you have a similar problem:
Backlight is always at full brightness after a reboot with amdgpu driver
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Thanks for that link… Weird bug and very interesting.
I don’t know if my situation is exactly the same, since my backlight doesn’t seem to be set to full brightness each reboot, just come random level; however, I can test to see if any of those proposed solutions work.