I have exactly the same problem. Nvidia with ubuntu 12.04. With two monitors attached and unity running, compiz consumes 50% of CPU, and computer becomes unusable. I am able to solve the problem by either (i) removing one of the monitors or (ii) disabling the unity plugin; just as the original reporter stated. I am running the latest nvidia drivers available through jockey.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/877438 Title: [8xxx] 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp