HD 7970 Catalyst 13.12
Dual monitor one connected via dvi and other dvi to mini dp
Windows 7 64bit
I did not have this problem before updating drivers to 13.11. Come back to computer after inactivity and it won't come back to life. Computer appears to be on: fans spinning, lights on, etc. Keyboard or mouse won't bring monitors out of sleep. Keyboard not working - numlock or capslock do nothing. Only option is hard reset.
Workaround: Created custom power plan and disabled all power management features, including setting "Turn off display after" to "Never" and problem went away.
Had previously tried turning everything off but "Turn off display after" to "Never" with no luck. Had previously updated all other drivers with no luck.
I don't care much about my carbon footprint but I would like to save a little money on electricity. Hopefully AMD will fix this problem. There seems to be enough people having the problem that it isn't random or related to something other than the video card drivers.