[mythtv-users] MythTV performance optimisation - live TV watching?

[Ruskii Kapitan]

Good evening

I am trying to build a MythTV box from the PC of the resonable (IMHO) 
spec - Athlon processor 1060Mhz, 256 Mb RAM, VIA 266A chipset 
motherboard, two Seagate barracuda HDDs.  The only week point I would 
think of is the video card - it's one of those old PCI ATI 
all-in-wonder ones (not even sure about which exactly model) with 8 Mb 
of memory. I am not using it as a TV-tuner, it's used as a video card 
with TV-out (I have not got to the point of trying TV-out yet).  It's 
seems to be good enough for watching DVDs, DivXs and others. My WinTV 
card works fine with xawtv and tvtime, and it seems to work fine with 
MythTV when recording shows. 

The problem: live TV is not completely in sync with the sound and it's 
loosing frames. Watching the show pre-recorded is fine. The problem is 
there while using both GATOS and standard XWindow ATI drivers, 
although with GATOS ones it seems to be a bit better (I am not sure if 
this is the case).

At first I thought it's HDDs, but the indicator on the front pannel 
does not seem to show to much activity. Processor seems to be fast 
enough, besides I've read people reporting even weeker then mine 
hardware working with MythTV fine. What can be my problem?

I am using 0.14 release (updated KnoppMyth - debian unstable).

Thanks for any help in advance
Andrey