[mythtv-users] HD-3000 and changes from 18.1 to SVN

[Chris Dos]

I have a HD-3000 card that I got working using the 18.1 Debian packages. 
However, upgrading to SVN resulted in the frontend spewing "A/V diverged by 
<dropped frames number here> frames, extending frame to keep audio in sync" in 
it's logs.

I guess I need to layout my system and what I've found out so far.

Relevant System Componets:
Debian Sid
AMD Sempron 64 1600+, overclocked to 2.0 ghz from 1.6 (lot of head room in that 
chip, I read someone getting 2.6 ghz out of it)
512 MB PC2100 memory.
7200 RPM IDE 120 GB Drive.
HD-3000
PVR-350
nVidia FX5200 DVI Card (Using XvMC, This outputs to my DLP HDTV)
ivtv-.4.0
Kernel 2.6.13 using the DVB drivers for the HD-3000

It took me a good three weeks to the HD-3000 card to work properly.  I kept 
getting the "A/V diverged by 4.28889 frames, extending frame to keep audio in 
sync" errors whenever I had the sound enabled on MythTV.  Disable the sound and 
720p and 1080i would play flawlessly.  Enabled sound, and the dropping frames 
would occur again.

I tried a SB Live card and the on board VIA audio and still experienced the same 
problems.  Everything pointed to the sound card being the problem.  I had 
tweaked just about every setting possible to solve the problem.

Nothing worked, until changed the DVB recording buffer options.  Myth defaults 
with 8192 for "Per PID driver buffer size" and "Packet buffer".  I changed this 
to 16464 and HDVD played flawlessly (well, as good as XvMC and OSD can play nice 
together).  So the problem doesn't appear to be sound related, just how much 
buffer was available to fit the signal.

So now I upgraded to SVN on Friday, and the "A/V diverged" frames problem showed 
back up.  Changing the "Per PID driver buffer size" and "Packet buffer" to as 
high as 100000 and as low as 8192 made no difference.

Does SVN no longer use the buffer settings?

Any insight into finding out what this problem is would be greatly appreciated.

	Chris