[mythtv-users] choppy playback on one network frontend fine of the other

[William Munson]

ryan patterson wrote:
> Hello all,
>
> I have a really annoying problem.  My main frontend now has horrible 
> choppy pauses whenever I try to watch something (worse on HD 
> recordings but alsso affects non-HD).  I really don't know why this is 
> happening.  I didn't change any hardware.  This has been a stable 
> system for over 12 months and it worked fine for weeks after upgrading 
> to mythtv 0.21.  I can use my second frontend without any problems.  
> So I don't think the issue is with the backend.
>
> Here are some details about my setup:
> all computers are running ubuntu 7.10 and mythtv 0.21 (I do not 
> compile it myself)
> dedicated backend -> duel intel  Xeon 2GHz
> dedicated frontend (has problems with playback) -> intel core 2 duo 
> 1.8GHz, nvidia Geforce 7600GS
> desktop with frontend (no problems with playback) -> intel pentimum D 
> 3GHz, nvidia Geforce 7800
>
> There does not seem to be any bottle necks that I can find.  The CPU 
> load on the frontend doesn't look critical during playback..  I have a 
> gigabit network which has been plenty fast for over a year.
>
> Here are some of the error messages mythfrontend outputs:
> 2008-04-30 21:56:27.977 NVP: prebuffering pause
> 2008-04-30 21:56:27.983 WriteAudio: buffer underrun
> 2008-04-30 21:56:29.357 NVP: Prebuffer wait timed out 10 times.
> 2008-04-30 21:56:30.397 NVP: prebuffering pause
> 2008-04-30 21:56:33.781 NVP: prebuffering pause
> 2008-04-30 21:56:33.789 WriteAudio: buffer underrun
> 2008-04-30 21:56:34.575 NVP: prebuffering pause
> 2008-04-30 21:56:34.581 WriteAudio: buffer underrun
> 2008-04-30 21:56:35.126 
> RingBuf(myth://192.168.0.210:6543/1051_20080430190000.mpg 
> <http://192.168.0.210:6543/1051_20080430190000.mpg>): Waited 1.0 
> seconds for data to become available...
> 2008-04-30 21:56:35.941 NVP: prebuffering pause
> 2008-04-30 21:56:38.562 WriteAudio: buffer underrun
> 2008-04-30 21:56:38.969 NVP: prebuffering pause
> 2008-04-30 21:56:38.970 WriteAudio: buffer underrun
> 2008-04-30 21:56:39.775 
> RingBuf(myth://192.168.0.210:6543/1051_20080430190000.mpg 
> <http://192.168.0.210:6543/1051_20080430190000.mpg>): Waited 1.0 
> seconds for data to become available...
> 2008-04-30 21:56:40.367 NVP: Prebuffer wait timed out 10 times.
> 2008-04-30 21:56:41.519 NVP: prebuffering pause
>
> Any ideas?
>

Buy yourself a new network card. The old one has died.