I forgot to point to a workaround you can use until the bug gets fixed: remove lightdm and (re)install gdm (like in Ubuntu 11.04) as display manager. Open a terminal and enter: 'sudo apt-get remove lightdm' and 'sudo apt-get install gdm'.
I forgot to point to a workaround you can use until the bug gets fixed: remove lightdm and (re)install gdm (like in Ubuntu 11.04) as display manager. Open a terminal and enter: 'sudo apt-get remove lightdm' and 'sudo apt-get install gdm'.