I've just installed ubuntu 11.04 64 bit and the gui feels really slow and choppy.
glxgears for example feels like I'm killing my pc because everything becomes really choppy and it looks like I don't even get 1 fps in glxgears. But in the console it says i get about 4.200 fps.
I've tried installing the latest driver manually with this guide: http://wiki.cchtml.com/index.php/Ubuntu_Natty_Installation_Guide. It didn't help.
I also tried this: http://www.jondev.net/articles/Ubuntu_11.04_choppy_or_slow. Didn't help either.
So right now I have Catalyst 11.5 installed via the x-updates ppa.
If you have any ideas, then please help me because at the moment my ubuntu installation is hardly usable (oh, btw. reinstalling it didn't help).