12 hours ago
After the upgrade to Ubuntu 12.10 from 12.04, no GUI is displayed. I have to operate my PC in the Command line. How can i solve this problem?
1 hours ago
Do you have an ATI card? Maybe a HD4xxx or lower? And you used to have the proprietary drivers (fglrx). Well, this setup won't work anymore (bug).
Unfortunatly, amd considers these cards legacy and they don't receive as much love as they deserve anymore. Remove the proprietary drivers (sudo apt-get purge fglrx*) and reboot to use the opensource drivers.
sudo apt-get purge fglrx*
5 hours ago
sudo apt-get install --reinstall lightdm
If that does not work, try:
sudo apt-get install gdm
And when asked, select gdm.
26 hours ago
did you use proprietary graphic drivers before upgrading?
if so, there might have been some upgrade problem. try to reinstall them following the appropriate instructions at https://help.ubuntu.com/community/BinaryDriverHowto
If not, try issuing the command
grep EE /var/log/Xorg.0.log
this should show the errors and hopefully the cause of your problems. add that to your problem in order to better understand what's the issue.