[mythtv-users] Prebuffering Pause?

[Ben Lancaster]

David Frascone wrote:
>
> I've done some more digging, and found these messages strewn 
> throughout my mythfrontend logfile whenever the video pauses.  I added 
> -v playback, and I have this output -- anyone know why this is 
> glitchy?  This is NOT HD -- it's plain old SD.  (Although it does 
> happen in HD -- at approximately the same frequency)
>
>
> 2007-07-09 16:07:48.950 Avg read interval was 198 msec. 96K block size
> 2007-07-09 16:07:48.990 Avg read interval was 198 msec. 128K block size
> 'video_output' mean = '33365.12 ', std. dev. = '364.60', fps = '29.97'
> 2007-07-09 16:07:49.238 Avg read interval was 193 msec. 64K block size
> 2007-07-09 16:07:49.255 Avg read interval was 197 msec. 64K block size
> 2007-07-09 16:07: 49.279 Avg read interval was 197 msec. 64K block size
> 2007-07-09 16:07:49.298 Avg read interval was 197 msec. 64K block size
> 2007-07-09 16:07:49.366 Avg read interval was 181 msec. 64K block size
> 2007-07-09 16:07: 49.398 Avg read interval was 198 msec. 64K block size
> 2007-07-09 16:07:49.922 Avg read interval was 195 msec. 64K block size
> 2007-07-09 16:07:50.138 Avg read interval was 193 msec. 64K block size
> 2007-07-09 16:07: 50.395 Avg read interval was 194 msec. 64K block size
> 2007-07-09 16:07:50.662 Avg read interval was 195 msec. 64K block size
> 2007-07-09 16:07:50.678 Avg read interval was 197 msec. 64K block size
> 2007-07-09 16:07: 50.851 NVP: prebuffering pause
> 2007-07-09 16:07:50.852 NVP: Waiting for prebuffer.. 0 
> AAAAAAAAAAAAAAAAAAAAAAAAu
> AALAAA
> 2007-07-09 16:07:50.926 Avg read interval was 194 msec. 64K block size
> 2007-07-09 16:07:50.947 Avg read interval was 198 msec. 64K block size
> 2007-07-09 16:07:50.967 Avg read interval was 198 msec. 64K block size
> 2007-07-09 16:07:50.987 Avg read interval was 197 msec. 64K block size
> 2007-07-09 16:07:50.994 NVP: Waiting for prebuffer.. 1 
> AAuLAAAAAAAAAAAAAAAUUAUUU
> UUUAAU
> 2007-07-09 16:07:51.006 Avg read interval was 197 msec. 64K block size
> 2007-07-09 16:07:51.026 Avg read interval was 196 msec. 64K block size
> 2007-07-09 16:07: 51.246 Avg read interval was 190 msec. 64K block size
> 2007-07-09 16:07:51.399 Avg read interval was 189 msec. 64K block size
> 2007-07-09 16:07:51.418 Avg read interval was 196 msec. 64K block size
> 2007-07-09 16:07: 51.443 Avg read interval was 197 msec. 64K block size
>
> The others don't show any more detail.  This happened when upgrading 
> from 13534 to 13836.
>
> I have the same version (13836) running on another frontend w/o issues.
>
> Thanks in advance,
>
>
> -Dave
>
> -- 
> David Frascone
>
> Oxymoron: Safe Sex.
> ------------------------------------------------------------------------
>
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>   
No idea how/why this helps, but I had exactly this problem on my FC4, 
FC5 and FC6 systems until I added 'noapic' to my kernel args:

default=0
timeout=1
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.20-1.2952.fc6)
        root (hd0,0)
        kernel /vmlinuz-2.6.20-1.2952.fc6 ro root=/dev/sda2 noapic rhgb 
quiet
        initrd /initrd-2.6.20-1.2952.fc6.img

Give it a whirl, hope it works for you too.

Ben