Comment # 48 on bug 43829 from Swoorup

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