@halva isn't there an option for the power profiles as you boot or something.. ive seen it in the hardware-configuration.nix files that get autogenerated... other than that it might be external stuff like a display or arch might not have something properly
@halva could it be something like screen brightness or even if you had hardware that worked on arch that doesn't on ubuntu (like idk fingerprint scanners?), last thing i can possibly think of is arch pkgs being more bleeding edge there might be a bug in a driver of some sort. i really have 0 clue
@autumn this laptop doesnt have any weird hardware (actually, there's the ir blaster for windows hello but it was working in ubuntu but is disabled in arch lol)
idk it's probably some weird optimization ubuntu does but arch doesnt