[mythtv-users] 0.17 kernel 2.6.11 problem

[Troy Roberts]

I have a single backend driving 2 frontends - all debian based.  I
recently updated them al to the 2.6.11 kernel
kernel-image-2.6.11-1-686  I now have a significant amount of
'stutter' druing playback on both frontends

Each frontend has a slightly different hardware config (mobo, audio,
cpu speed) but the same video card (nvidia), intel procs, etc.

The backend is capturing everything fine because if I copy the .nuv
file over to a windows box or to my videos dir they play fine
(including in mplayer), it is just during myth playback that the
problem seems to exist.

I have tried the following:

- renice the mythfrontend process
- renice the mythbackend process
- set use video as timebase
- set agressive audio buffering
- monitored my local lan (100Mb FDX) to look for network congestion

Does anyone have any suggestions as to what may be causing this? Is it
a myth problem, or a linux kernel problem?

FWIW, I captured a number of prebuffering messages in the mythfrontend log:


2005-04-07 23:36:45.567 WriteAudio: Preparing 4096 bytes (1024 frames)
2005-04-07 23:36:45.567 audio waiting for space on soundcard: have 368 need 4096
2005-04-07 23:36:45.574 audio waiting for space on soundcard: have 1676 need 409
6
2005-04-07 23:36:45.581 audio waiting for space on soundcard: have 3020 need 409
6
2005-04-07 23:36:45.588 Broadcasting free space avail
2005-04-07 23:36:45.588 WriteAudio: Preparing 4096 bytes (1024 frames)
2005-04-07 23:36:45.588 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.588 Broadcasting free space avail
2005-04-07 23:36:45.592 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.592 Broadcasting free space avail
2005-04-07 23:36:45.596 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.596 Broadcasting free space avail
2005-04-07 23:36:45.600 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.600 Broadcasting free space avail
2005-04-07 23:36:45.604 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.604 Broadcasting free space avail
2005-04-07 23:36:45.608 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.608 Broadcasting free space avail
2005-04-07 23:36:45.612 audio waiting for buffer to fill: have 512 want 4096
2005-04-07 23:36:45.612 Broadcasting free space avail
2005-04-07 23:36:45.616 audio waiting for buffer to fill: have 512 want 4096
:
Thanks in advance - any help would be muchly appreciated
Troy