Can you check your /etc/xorg/xorg.conf if the Composite extension is listed there? Probably it is responsible for some of this?
** Changed in: unity Status: New => Confirmed -- 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/894132 Title: unity does not start using xinerama and multi-monitor To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/894132/+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