FYI: XBMC is slow on Xpress 1250, fast on X1650 PRO

[Toan]

Hi

I have a ASUS M2V-HDMI motherboard with internal ATI Xpress 1250,
and a PCI-E ATI X1650 PRO card. I use it as Home Theater System
with XBMC software. I use Ubuntu 10.04, with xorg-edger PPA
repository.

If I use the Xpress 1250 graphic card, XBMC is very slow (~10-15 fps).
On the other hand, XBMC on ATI X1650 PRO gives 70-90 fps. FPS for
glxgears, however, are quite similar on both).

For obvious reasons (less noise, less power consumption, direct HDMI
output), I prefer to use the internal Xpress 1250 card if possible.
I don't know if I setup it wrong (wrong options,....) or is it because
of the open source radeon driver is much better for X1650 than X1250
at the moment. If anyone could help me with this, i'll greatly
appreciate it. I'd happy to send you all the logs, ....

Best regards
Toan