Compiz produces CPU overhead when dual display on F15

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http://forums.fedoraforum.org – Hi, I am still using Fedora 15 and still having trouble with dual displays. Immediately when I connect an external display, CPU usage of "compiz" goes up and everything else gets slow. OS: Fedora 15 Desktop: Gnome 3.0.1 CPU: Intel® Core™ Duo CPU T2350 @ 1.86GHz × 2 Graphics: Intel® 945GM (HowTos)