I remember someone reported problems with ATI video card in SL 5.0 Well, ATI issued on 25/06/2007 new drivers 8.38.6: http://ati.amd.com/support/drivers/linux64/previous/linux64-r-8-38-6.html and they worked perfectly with ATI X1600 on my laptop. I updated wiki's part for SL 5.0: http://wiki.cchtml.com/index.php/RedHat_Enterprise#Scientific_Linux_.28SL_5.0.29 May be someone will find it usefull. May be there is sufficient info about solving problems with the driver so someone could build correct rpms and put them into rpm repository. Thanks, Alex