https://bugs.freedesktop.org/show_bug.cgi?id=43829
--- Comment #48 from Swoorup swoorupj@gmail.com --- I got the same issue here.
After I suspend my machine and try to wake up, the screen does not display anything else. And I'd have to blindly switch to tty terminal and type reboot.
Info: Linux 3.13.8-1 (Arch linux) Mesa - 10.1.0
Radeon 7520G