xf4 and lombard

hi !

i have compiled xfree 4.0.1 with the latest xfree86-pmac tree from
linuxppc.org. as kernel i use the latest pmac-stable and pmac-devel from
linuxcare. when starting the x-server i get a dark screen, final beep and
- after 180 seconds - the system reboots (kernel panic?).

the ati driver doesn't recognize the real amount of videoram, even if i
use the 'VideoRam'-option. i have attached the some parts of my
XF86Config.0.log file (the system i use at the moment is really bad - no
cut'n paste).

does anyone know how to solve this problem ?

thank you very much in advance !
/thorsten