Hi Johannes and every friend of the list :D.

Johannes two things:

1.- I think (i guess) it's better install the 8.36.5 ati drivers, because
the 8.32.5 ati drivers is too bugs and is better have the actual driver, you
can download from the ati page and put on the portage distfiles and install
it.

2.- If you don't like the 1 then look here :
http://forums.gentoo.org/viewtopic-t-554065-start-0-postdays-0-postorder-asc-highlight-atidrivers.htmland
http://forums.gentoo.org/viewtopic-t-554736.html?sid=eeac31c8c7d77b4d130703a372462537
that persons have a problem very similary to yours.

Well about your question I think, check your kernel configuration Graphics
Drivers, you have to unmark the ATI modules of the kernel. At last, I had
the same problem with 8.32.5 my laptop frezee and the only thing what can I
do was reset using the Power bottom; and the solution was install the
8.36.5ati driver, believe me.

I hope be helpfully to you, Have a nice day :D

-- 
Francisco Rivas
Linux User (New) : #448324
Linux Machine (New) : 355187