... unfortunately I realized that my problem begins NOT with screensaver activation, but screen LOCK activation. During test I switched off the LOCK, this is why my problem seemed to be solved.
I found another bug report which describes my problem: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1322751 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969860 Title: fglrx uses 100% CPU when screen turns off (spinning in glXWaitVideoSyncSGI or glXSwapBuffers) To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/969860/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs