For me changing from the gnome-screensaver to the xscreensaver worked. I still have around 7% of CPU usage from compiz while the screen is locked, which in my opinion is still a lot for displaying nothing, but at least it consumes less battery on my laptop.
I am running Ubuntu 12.04 on a HP EliteBook 8470p with AMD 7570M graphics. -- 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