Failed to startx with SLES 8 on PPC 64bit

Hi, Unfortunately I have to upgrade from SLES 7 to SLES 8. But when I start X server, it reports that "Failed to load module 'mga' (module does not exist,0)". When I istall the machine, Yast2 was able to start up a crude X (I guess the resolution was 640*480). Does anybody have any advice on how to fix this? Even the crude 640*480 screen would be better than nothing. Thanks. __________________________________ Do you Yahoo!? The all-new My Yahoo! - What will yours do? http://my.yahoo.com