Possible duplicate: "[arrandale] desktop is messed up with external monitors (x86_64)" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/745112
Possible duplicate: /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/745112
"[arrandale] desktop is messed up with external monitors (x86_64)"
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