I have Ubuntu, version 12. I installed ATI driver and I'm getting an error running in low graphics mode.
I needed to install the driver because every time I update or upgrade Ubuntu, right after installing the packages the system runs in low graphics mode.
The answer here also couldn't help me.
Graphics card model: ATI Radeon HD 3600
Installing fglrx also didn't help. The ATI driver is still installed and it still runs in low graphics mode. What should I do?
Ok. Let me try to help you :D
-Go to Recovery mode
-Enable network (so you have internet connection)
-Go to Root option (Recovery mode)
-When you are in terminal delete lightdm type without brackets {sudo apt-get remove --purge lightdm}
-Then type without brackets {sudo apt-get install lightdm} (wait to install it)
-Then type without brackets {sudo service lighdm start}
-When it's finished type exit (you will get back to Recovery console)
-Then go on third option dpkg (Repair broken packages)(confirm with Y)
-When it's finished with installing packages type without brackets {sudo reboot}
-After reboot you will have back your Ubuntu! :D
I solve this problem after 1 day... Im a new user :D Almost forgot i have Ati Radeon HD6770 graphic card, if you have Nvidia try it... Hope this was helpful!