Can't get Myth on Kubuntu 9.10 Karmic Beta to work - no sound, poor video

[Paul]

I've got an old Dell system running Kubuntu 8.04 and Myth quite well 
using a Hauppauge Nova DVB-T stick. Seeing that Karmic 9.10 will use 
Myth 0.22 I thought I'd try to update things. I've scrounged a HP Compaq 
Evo D530 box (typical office PC, P4 2.66Ghz, 1Gb Mem small form factor 
etc) and a Hauppauge PVR-150 MCE card.

I planned to install the beta, play about getting the box to record off 
of my Sky box analogue output, then install the final release and add 
the DVB-T stick. However I have several issues with the beta that I 
can't get around;

I don't have any sound from the PVR150. This is both from the box, or 
from recordings I watch on another box after downloading
Video playback is jerky
I can't get tvtime to work to check out the card, giving an error about 
YUY2 Hardware video overlays, also xvinfo reports no adaptors present. 
The box has an intel videoset (Intel 82865G)

Right now I don't know if its the intel graphics, the hauppauge card or 
the Karmic beta ? Does anyone have any ideas ? Is anyone else running 
myth successfully on an Evo D530

Thanks,

Paul.