Same problem here with Ubuntu 12.10 running kernel 3.5.0-37-generic. Acer Apire Timeline U SSD 20GB with Btrfs - / HDD 500 with Ext4 - /home 6GB Ram
Then the "sudo /etc/init.d/lightdm restart" helps me. Intel(R) Core(TM) i5
Same problem here with Ubuntu 12.10 running kernel 3.5.0-37-generic.
Acer Apire Timeline U
SSD 20GB with Btrfs - /
HDD 500 with Ext4 - /home
6GB Ram
Then the "sudo /etc/init.d/lightdm restart" helps me.
Intel(R) Core(TM) i5