Comment 7 for bug 990313

The fan does not start right after locking begins.

When I log in again, one of the processors has been running until that moment at 100%

When I switch the monitor tab to see the tasks, compiz is at 84% but I am not sure if that is the culprit.

I don't know if the problem depends on an application that is active, it might be:

chrome, thunderbird or rhythmbox (not playing)

will be continued when more info is available.