https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #210 from Shawn Starr shawn.starr@rogers.com --- It's same for me, I can have several days of stability on my W500 w/ RV636 (HD 3650) and then GPU reset.
I note, the GPU never recovers, when it attempts to Xorg is basically frozen, I can VT switch to console but sometimes switching back to X it deadlocks completely.
I do recall eariler in 3.x GPU reset worked and it would recover. Now, it's a lost cause.