uname -a
Linux crunchbang 2.6.32-5-686 #1 SMP Wed Jan 12 04:01:41 UTC 2011 i686 GNU/Linux
lspci
01:00.0 VGA compatible controller: ATI Technologies Inc RV380 0x3e50 [Radeon X600]
01:00.1 Display controller: ATI Technologies Inc RV380 [Radeon X600] (Secondary)
aticonfig --initial
aticonfig: No supported adapters detected
Делал по вики (для Lenny-backports/Squeeze/Sid):
http://wiki.debian.org/ru/ATIProprietary