I got similar problems using single monitor configuration, just after upgraded my ATI card driver to the latest AMD propietary driver (12.2). Compiz used 50-80% of my CPU. Before I used AMD propietary driver (12.1) without experiencing this problem. So I consider this as a regression. My card is ATI Mobility Radeon HD 3650.
I just downgraded my AMD propietary driver back to version (12.1) and compiz CPU usage reduced to less than 10%, but usually between 0-2%. I'm not sure that my problem fit in this bug, since in the header it was mentioned that nvidia drivers & dual head have problem. But the symptoms are quite similar. If there is a similar bug which is related to the AMD driver please let me know. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/877438 Title: Unity/compiz has sluggish performance on dual-head with nvidia driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/877438/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
