I recently installed Ubuntu 12.04 and most of the times I can't turn off my laptop. It freezes at the purple "page" with the white and red dots. I have to unplug the battery for the computer to shut down.
Any ideas?
12.04 (precise) 32-bit
Linux 3.2.0-35-generic-pae
GNOME 3.4.2
encrypted LVM
Samsung R522
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