I just recently installed Ubuntu 12.04, and I am new to Linux. After my first attempt, the system crashed and ubuntu would not start, not even in recovery mode with low graphics. The error message said something about LightDM Display Manager. This is what I did that resulted in the crash:
First I ran the Additional Drivers program and activated the recommended graphics driver (I think it was NVIDIA version 304. The other choices were version 173 and version 304-updates). I have a Nvidia GeForce 6600GT graphics card. Now I probably should have restarted, but instead I installed Chromium, then restarted. Ubuntu crashes upon start as described above. I tried to repair it with some help from ubuntu forums, but no success. The cascade of error messages thrown at me when trying to remove the drivers (or whatever I was trying to do) said something about Chromium.
I reinstalled Ubuntu and it is working fine, but I would like to install a graphics driver. I did try the Nvidia version 173, and it seemed ok, except that the startup and shutdown sceens look wierd, so I removed it. Now the system says I have the Gallium 0.4 on NV43 graphics driver.
And now to my questions:
1-Do I dare to try the 304 again? Or the 304 with updates version? I don't want to have to reinstall Ubuntu again...
2-Could Chromium had been the problem?
3-What is "Gallium 0.4 on NV43"?
4-How can I tell if the graphics driver I have is ok?
Thanks for any help!