I have updated my AMD athlon computer with Ubuntu 11.04 to Ubuntu 11.10, and the installation was successful. The computer was working smoothly.
But when I installed the graphics driver it had suggested to me, the next time I booted it did not work. The screen resolution of the initial login screen was off, and once I had logged in it had a very, very small resolution, and the display was all distorted. Much of the menubar was broken and everything in general looked distorted also. It after a few minutes went into a screen that checked my battery and other things, and then turned off.
Now when I turn on the computer I more often than not get a failed login screen that cannot display many of the components of the login screen.
I am a newbie to using ubuntu so sorry if this is a stupid question.
Thanks for your help in advance :D
EDIT:
These pictures show some of the login screen errors:
(Under GDE login option)