I originally asked this question over the Ubuntu forums, but I'm not really sure where the best place to get help is. Anyway...
I've had Ubuntu 11.04 installed on my desktop since it's release. Up until an hour ago, it was working fine. I clicked on an update from the update manager, now booting into a graphical mode is completely broken, (the start-up load hangs at 'Check Battery State ... [0k]'). I restarted my computer, and booted into safe mode, and launched the terminal. This all works fine. I then typed :
sudo gdm start
into the command prompt, hoping that I would be able to start things manually. Instead, it spat out this:
gdm-binary: WARNING: Unable to load file '/etc/gdm/custom.conf'. No such file or directory. gdm-binary: WARNING: Unable to find users : no seat-id found. gdm-binary: WARNING: Gdm Display: display lasted 0.070467 seconds
The last line was printed about 8 times, with slightly different times, before it gave up and failed. Some information which might help, I have Gnome 2, Unity and KDE (not sure which version), installed. My graphics card is the GTX 275, and I have driver the Nvidia driver 275.21. So yeah, I think the update has gone and moved custom.conf somewhere, but I have no idea on how to fix it. I have a graphics programming assignment due on Friday and I would be eternally grateful if I could get this fixed well before then. Thanks.