Re: Nvidia drivers gone after update
If you are using a clean install of 12.04.2, not an update, with the 3.5 Quantal kernal, some programs are not compatible with the Xorg and linux -lts-quantal files.
I had exactly the same problem, except I tried to install the 'post-release updates' version of nvidia from Synaptic and - luckily - it gave me a warning that lots of the 'lts-quantal' and 'backports' files would be un-installed.
So I used the nvidia.com Downloads to install 304.51 which I knew was reliable and stable with all my equipment.
Steam is also one of the programs affected.
"Better Solutions may bring Worsened Problems": After Lao Tse, b. circa 405BC. a contemporary of Confucius, who died circa 600BC.
They did things differently in those days, apparently!!