[mythtv-users] Error: Try to manually increase audio buffer with: echo 192 | sudo tee /proc/asound/card0/pcm1p/sub0/prealloc

[Chris Porter]

On Wed, Apr 20, 2011 at 9:32 AM, Steven Adeff <adeffs.mythtv at gmail.com>wrote:

> On Mon, Apr 18, 2011 at 11:32 PM, Jean-Yves Avenard <jyavenard at gmail.com>
> wrote:
> > On 19 April 2011 13:00, Chris Porter <hoodlum7 at gmail.com> wrote:
> >
> >> The user mythfrontend is running as does not have permissions to
> increase
> >> the audio buffer. I suggest putting the line
> >>
> >> echo 192 | sudo tee /proc/asound/card0/pcm1p/sub0/prealloc
> >>
> >> into one of your startup scripts.
> >
> > Note, that using more than 64kB of audio buffer is only working with a
> > limited amount of card, mainly Intel and nVidia.
> >
> > It you see this error, and audio plays fine, no need to worry.
> > It's not much of a problem playing stereo audio, or digital AC3/DTS
> >
> > However, using LPCM audio or TrueHD/DTS-HD bitstreaming will be an
> > issue with just the default 64kB
>
> this is for an nVidia GT220. what permission changes would I need to
> make to safely allow the user to adjust it?
>
> --
> Steve
> http://www.mythtv.org/wiki/User:Steveadeff
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you would have to setup sudo to allow the user mythfrontend runs as to make
the change with out prompting for a password.


-- 
Working on World Domination since 2001
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