[mythtv-users] [ATrpms-users] Confused: why did video performance DECREASE (up to 70%) after upgrading video card by 2 generations??? Please validate my analysis
George Mari
george_mythusers at mari1938.org
Mon Dec 8 14:17:52 UTC 2008
Jeffrey J. Kosowsky wrote:
> George Mari wrote at about 21:55:00 -0600 on Sunday, December 7, 2008:
> > Jeffrey J. Kosowsky wrote:
[deleted]
> > > In both cases it seems like the video lags the
> > > sound with the sound pausing every few seconds to wait for the "slower
> > > motion" video to catch up giving the sound a jerky appearance.
> > >
> > > Also with the older card when viewing HD programs (but not SD
> > > programs) I got a lot of "NVP: prebuffering pause" errors in addition
> > > to the "WriteAudio: buffer underruns" that occur with each sound
> > > pause. I assume this is consistent with the fact that CPU usage is
> > > becoming a bottleneck on the 4600 for HD.
> > >
Hi Jeff. Did you read through this page on the wiki? Especially the
section "Audio issues" that specifically mentions the error message you
got - "WriteAudio: buffer underruns".
http://www.mythtv.org/wiki/index.php/Troubleshooting:Prebuffering_pause
Tell us about -
1. Your distro
2. Your desktop (KDE, Gnome, other)
3. What sound system you're using (ALSA, PulseAudio, OSS)
4. Audio system config file (alsa.conf)
5. Your audio hardware (built-in motherboard audio, PCI card, make and
model)
6. Audio driver version
7. Your audio settings in your mythfrontend setup
8. Anything else audio-related I haven't thought of. :-)
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