I am having the same problem with an HP Envy 17 (Mobility Radeon HD 5800 Series) with FGLRX (I can't reproduce it with the open source driver).
I attached the stack output. ** Attachment added: "compizstack.txt" https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/969860/+attachment/3061431/+files/compizstack.txt -- 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] compiz uses 100% CPU when screen turns off To manage notifications about this bug go to: https://bugs.launchpad.net/compiz-core/+bug/969860/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs