[mythtv-users] Slight stutter on playback, 0.23 on ION 330HT

[Robert Shields]

On Mon, Oct 25, 2010 at 10:15 AM, Richard Shaw <hobbes1069 at gmail.com> wrote:

> On Mon, Oct 25, 2010 at 9:10 AM, "Per J. Frøysa"
> <per.froysa at broadpark.no> wrote:
> > I have had this stuttering when subtitles are enabled (only then) on my
> > 0.23 ION 330HT - from day 1.
> > But, if "Slim" is degrading the quality of the picture - I would rather
> > have it stutter.
> >
> > I have also noticed that stuttering is mentioned
> > inhttp://www.mythtv.org/wiki/VDPAU#What_doesn.27t.3F but this has not
> > been a topic among mythtv-users so I believed until now that I had a bad
> > installation.
> >
> > Rendering some letters of subtitle seems be an expensive operation.
> > Could any of the alternatives below eliminate this problem?
> >
> > A) Is subtitle rendering coded in a separate thread - separate from the
> > VDPAU thread? Could we use realtime priorities?
> > B) Wonder if Gnome has something to do with the rendering - should I use
> > the more lightweight Xcfe?
> > C) Install a clean mythbuntu? Is mythbuntu stuttering as well?
> > D) Compile the .24 trunk on a clean 10.10 with an optimized config file?
> > E) Give up and buy a heftier motherboard for the FE??
>
> I wish I could give you some specific advise but hopefully what I have
> will help.
>
> If the problem only occurs every few minutes I wonder if it is some
> sort of system service that's waking up on regular intervals? Have you
> already disabled all non-essential services?
>
> Also, while it probably isn't a resource issue, Gnome is a BIG full
> featured DE. Why not try something more light weight? I used XFCE
> early on but I actually like LXDE[1] the most. It's even more light
> weight and I use it on my old Asus 701 netbook as well.
>
> Richard
>
> [1] http://wiki.lxde.org/en/Ubuntu
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>

I have an ION 330 as well.  I don't use subtitles and still experienced the
video issues (shuttering) when using VDPAU.  I put it down to Slim and it
works well enough (still some shuttering).

It is strange to me that I am experiencing it without the typical setup
people have (subtitles) that would cause it.

I am planning on upgrading to Ubuntu 10.10 and Myth 0.24 once both of them
are relatively stable.
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