https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #7 from jaromir.obr@gmail.com --- Related fix for resume from suspend in kernel 5.15 explained here: https://www.phoronix.com/scan.php?page=news_item&px=AMD-S2idle-Fix-Linux... The say it could also fix an issue with brightness.