ubuntu boot problem

I have installed ubuntu 8.10 and update the software.
It worked very well at the beginning. But someday I found that can not enter the GNOME desktop, only left the command line.
such as:
"Fatal server error: No screens found"
"fatal error in x server"
As a beginner, I have no idea what happened. Lucky enough, after googling the internet, I found the solution working for me.

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At the command prompt
sudo aptitude install xorg-driver-fglrx
Then
sudo dpkg-reconfigure xserver-xorg

Select the fglrx driver and complete reconfigure reboot and you should be sweet.

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Thanks, Sharke, the author for the solution!