I've received my new laptop (IBM Thinkpad R60) and this box has an ATI Radeon Mobility X1400 inside ... this card is not even usable by the xorg radeon driver. So i had to chose between using the generic (and included) vesa driver or installing fglrx (ATI driver). The second choice was the way to go it seems, but when you use fglrx, you can not activate 'desktop effects' because fglrx is incompatible with Aiglx (see http://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&questionID=26907 ) . But it's possible to use Beryl+fglrx through Xgl (and so not Aiglx) on CentOS 5. Xgl is not included but i decided to give it a try and i built it (with beryl as well) for i386 and i've included both rpms in my little repository : http://rpms.arrfab.net .