Originally Posted by xazero
Thanks for your reply, And yes I'm really thinking to buy a Raedon HD 5xxx.
And, why does Firefox and KDE work just fine with Nouveau?
Good question. I have no idea but I have a dual-link display and nouveau doesn't work good at all with my setup.
Look at the thread "Poor 2D Performance" http://www.nvnews.net/vbulletin/show....php?p=2295984
It was danix not AaronP.
danix from NVIDIA Corporation says
Firefox sometimes allocates large pixmaps which exceed the hardware limitations of the GPU. These pixmaps have to be handled by a slow software fallback.