This bug:
https://bugzilla.redhat.com/show_bug.cgi?id=958326
has gotten me doing crazy things like setting up my android camera to take time lapse pictures of the screen every minute to find out exactly when it happens so I can look in the logs to see what was going on then :-).
Last night, the screen went funny between 1:16 am and 1:17 am. In /var/log/messages I found this sort of stuff:
Aug 16 01:17:08 zooty bluetoothd[453]: bluetoothd[453]: Endpoint registered: sender=:1.5382 path=/MediaEndpoint/HFPAG Aug 16 01:17:08 zooty pulseaudio[17966]: [pulseaudio] module.c: Failed to load module "module-esound-protocol-unix" (argument: ""): initialization failed. ...
Almost like something came around and reset a bunch of hardware at the same time the screen flaked out (though I found no messages at all for anything related to the intel video drivers).
Does anyone know of something that runs in cron (or maybe systemd) that helpfully resets a lot of hardware nightly?
This whole thing is getting more and more mysterious.