installed f36 on my MSI Modern Bm4w laptop with ryzen 5 4000 series chip and AMD Radeon graphics card. for some reason, the screen brightness changes itself randomly from time to time even tho I’m not even touching the computer.
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My experience (with an HP laptop using AMD Ryzen and Radeon) is similar to yours. I haven’t experienced random changes in brightness while it’s running, but the brightness on booting DOES seem to be random.
There’s nothing like that going on on my DELL laptop w/Intel.
Same for me on a Microsoft Surface Go 2.
I’ve posted a possible solution with libinput’s device quirks on keyboard - Brightness randomly up and down on MSI laptop - Ask Ubuntu. Please let me know if it works for you too.
Hi!
I’m having the same problem. I tried your fix but I am getting the libinput list-devices error: Failed to load the device quirks from /usr/share/libinput and /etc/libinput/local-overrides.quirks. This will negatively affect device behavior. See https://wayland.freedesktop.org/libinput/doc/1.26.2/device-quirks.html for details.
When I use libinput quirks list /dev/input/event<number>, 5 in my case, or any other number for that matter, it returns quirks is not installed, although to my knowledge this should always come pre-installed.
I’ve noticed this on systems with cameras, but it seems to be related to changes in ambient light such as movement of patches of sunlight from windows or car headlights shing into a window,and in some cases the keyoard backlight some on. If you aren’t using the camera you could try disabling it (or just put a bit of masking tape oever it).
Could it be the GPU or panel doing some power-saving thing? I heard something about this on some AMD laptops, and seen something I had to mess with on an old Dell XPS 13.
+1 My AMD laptop goes full brightness when power is unplugged / plugged.
Seems to happen to others as well: Brightness changes when plugging and unplugging the charger - #3 by wildcard - Support - Manjaro Linux Forum