[mythtv-users] XvMC HD Playback w/ OSD slows playback

Rich West Rich.West at wesmo.com
Tue Sep 18 13:10:38 UTC 2007

Rich West wrote:
> Rich West wrote:
>> Rich West wrote:
>>> Alex Halovanic wrote:
>>>> Are you sure that it is slowing down the entire time that the OSD is
>>>> onscreen? Or is it just when the OSD is in the process of popping up
>>>> and/or fading out?  If this is the case, then you can disable the OSD
>>>> fade time in the theme files or in mythfrontend if you're running a
>>>> recent svn version.  Also worth trying out is the Chromakey OSD hack
>>>> in that wiki page if you're using a 4 or 5 series card, as it uses a
>>>> different method to paint the OSD.
>>> To be honest, no, I am not sure if it is due to the fade or not.  I'll
>>> check tonight.. I ran out of steam last night.  Unfortunately, in this
>>> case, I am using an nVidia 6200 which doesn't have the hack. :(
>>> One interesting tidbit I noticed this morning was that our 32" LCD runs
>>> great with XvMC.  It's only the system pushing the larger TV (58"
>>> Plasma) that is exhibiting this symptom.  The systems are identical
>>> except for the xorg.conf and alsa.conf files.  I'll have to do a little
>>> more testing in the evening
>> Hrmm.. nope.  It is when any part of the OSD is up, not just during the 
>> fade in/fade out.
>> I'll try swapping the boxes just to see if the problem follows the system.
> It looks to be something unique with that system since the problem 
> followed the box.  I'll just go through and rebuild it from scratch. :)

Before rebuilding the box, I thought I would check to see if there were 
any differences in the xorg.conf files, and, to my surprise, the system 
I was having trouble with had :
Option "NvAGP" "1"
And the system that worked just fine had:
Option "NvAGP" "2"

So, I changed that setting on the problem system, and viola!  It works 
just fine..

I must have altered the setting at one point in time to see if it made a 
difference, and I never set it back. I always thought that the goal was 
to set it to "1" for better performance, but I guess I misunderstood 
what that setting really is supposed to do...


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