Comment 41 for bug 917210

I am having this issue, and I am up-to-date with all upgrades in the 12.04 beta. I have a HP Pavilion dv7 laptop with i7 quad core processor, AMD/fglrx video driver. Under unity 3d, when I lock the screen and it goes blank, the cpu and fan spin up. After unlocking and bringing the screen back up, the fan spins down. It looks like compiz or X is the process cranking up the CPU (given that I am looking at top and powertop just after logging back in, it is a bit like trying to figure out if the refrigerator light actually goes off when you close the door, but I think compiz is the culprit). In any case, this happens consistently under unity3d, but not under unity 2d.