Ubuntu reboots after initial logon

[eddieandmags]

I am so frustrated. I am a new user. I keep having issues at the main password screen. The computer starts, I click my login name, type password, start to hear the music, screen distorted, then reboot. Sometimes I have to do this up to 20 times before it finally logs in.

I am running a Biostar U8668-D Motherboard with 1gb ram. Video is onboard. I am not sure what type. I think it may be S3 Pro Savage.

How do I fix this???

[mörgæs]

If you want to find video card information just type
hwinfo --gfxThere have been reported a number of logon problems in Ubuntu 9.10. I guess it is worth investing one hour in doing a clean install of 9.04:

http://releases.ubuntu.com/9.04/