Ubuntu stops working after updates.

[TTIO]

My friend recently installed Ubuntu 9.04, and it was working fine until he ran the updates.
Now, whenever he tries to load it, it freezes once it's got to the end of the loading bar. We've tried booting into single user mode (doesn't give any problems) and booting with quiet off. No idea what the problem actually is...

This is what it comes up with now:
http://i40.tinypic.com/29f5cg1.jpg
http://i40.tinypic.com/sqtd9f.jpg

This is on an Acer 5535.

Thanks in advance for any help.

[devils casper]

It looks like you have Nvidia or ATI Graphics Card. Driver of these cards must be updated on every kernel upgrade.

Boot up in runlevel 3 and execute startx command. Post error message here, if any.

[TTIO]

It comes up with the same screen as before (in the second picture). Tried doing Ctrl+Alt+Backspace as well, but that didn't drop back to the shell, so we couldn't get any error messages.

[devils casper]

Boot up in Single User ( Rescue ) mode.
Execute this

sudo lspci | grep -i vga
grep -i driver /etc/X11/xorg.conf

Post output here.

[TTIO]

Didn't notice that :/
We decided to try the driver thing, and after much muddling through (working out which partition Windows was installed to, me learning how to use chmod, etc.) we got the driver working.

And it turns out that was the problem - once the driver was installed it booted the GUI just fine

Thanks.