My problem is similar to two other posts concerning ATI cards and 12.04 LTS: Post1 & Post2. In my case I use a Dell Precision M4300 laptop which uses a NVidia Quadro FX 880M.
Doing a lspci | grep VGA
gave me this:
01:00.0 VGA compatible controller: NVIDIA Corporation GT216 [Quadro FX 880M] (rev a2)
My workaround consists of logging in at the console and running sudo start lightdm
which works perfectly but I am looking for a better workaround than this ?
01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 310M] (rev a2)
Sometimes I get "The system is running in low graphic mode", a reboot usually fix it (I cannot launch lightdm manually since TTYs are black after X start).
– Giovanni Toraldo Jun 02 '12 at 08:17