I installed Mountain Lion a few days ago and noticed when I woke up the next morning, my computer was frozen on the screen saver. I thought this was odd, as it has never done that before, so I checked my Screen Saver settings and then went over to Energy saver. I have my settings as follows: Computer sleep - 20 minutes Display sleep - 5 minutes Thought everything was fine, so I left for work. But when I returned, the computer was frozen on the screen saver again. I set display sleep for 1 minute to test it out and after 1 minute, it didn't go to sleep... then I set my computer sleep to 1 minute as well, and it didn't go to sleep either. I went to terminal and typed in "pmset -g" and this is what I got: Active Profiles: AC Power -1* Currently in use: autorestart 1 powerbutton 1 halfdim 1 panicrestart 15 hibernatefile /var/vm/sleepimage networkoversleep 0 disksleep 10 sleep 0 hibernatemode 0 ttyskeepawake 1 displaysleep 5 womp 1 I don't know what the problem is, or how to fix it. Now I'm paranoid, cause there's a bit of image retention on the screen because of it... I'm having to manually put the computer to sleep when I leave. Ideas? Solutions? Thanks in advance!