flickering secondary monitor since the AMD update.

details: a 4K screen next to a 1080p one. it goes black for a moment, comes back, sometimes the windows jump to the main screen. ive rebooted plenty. id love a chekclist rather than random tips, since Ive already tried random tips. i have about an hour tonight to test things, and i would rather go through them in a sensible order lol tell me what you would check first and i will report back with results. thx in advance!!

