I installed Xubuntu a couple of days ago, and on that day I decided to install the ATI catalyst driver from the AMD website (due to better performance) for my card. I installed it, but I ran into a common error so decided to uninstall it using it's uninstall script, and now I am using Ubuntu's open source drivers because they are fine for my use. It uninstalled fine, and the open source drivers work, but now, about 50% of the time Ubuntu will not start up. What happens is the screen goes black and starts flickering, then goes blue but it never boots up, just stays there flickering. If I try to boot again afterwards then it works. I have tried to reinstall all of the open source graphics drivers, but the same thing happens. It's really strange.
My GPU: ATI Radeon HD 6450
If anyone has any ideas or suggestions please let me know.
Thanks in advance.