Description of problem: I usually leave my central unit on all the time, powering on the monitor only when I need local physical access. In today's rawhide the colours are good after a boot but trying to log in again after a few hours I'm greeted by a brown-ish screen (as if someone had smeared coffee everywhere)
Created attachment 349647 [details] X logs
(it re-works after killing the X session, waiting for the gnome stuff to sort itself, and login again)
seems this is triggered by gnome-screensaver, as killing it before going away workarounds the bug
I would venture to call attachment 349690 [details] brownish, and so this to be a duplicate of bug 508513. *** This bug has been marked as a duplicate of bug 508513 ***