[mythtv-users] Live TV - Prebuffering Pause

[Brian Wood]

On Feb 1, 2006, at 6:01 AM, Dave Pearson wrote:

>
> My problem is that when I try and watch Live TV from the PVR-250  
> (Composite
> and Tuner input) or from the Avermedia Composite input, I get constant
> prebuffering pauses. Live TV from the DVB Cards plays back OK and  
> recorded TV
> from any source is OK. If I watch from my Dell Inspiron 6000 (via  
> wireless
> network) I don't have any pauses. If I reconfigure X to use the nv  
> driver (on
> a single monitor) playback is perfect. I have tried all sorts of  
> combinations
> of the various playback settings, but nothing seems to help (most  
> of the time
> I end up with the frontend crashing). I have also tried swapping  
> the card for
> an ATI Radeon 9200SE, but this has the same problem with the  
> manufacturers
> drivers and dual head (it works fine with the ati driver and single  
> head).
>
> Any help will be gratefully received, I have attached the twinview  
> xorg.conf
>
Looks like it might be the infamous "High CPU load with nVidia  
drivers" problem, although it usually doesn't strike with the 7676  
drivers.

I'd check what the CPU load while watching (top or vmstat) and, if it  
is higher than it should be, try and figure out why.

You might try commenting out "load glx" in your X config. Re- 
compiling MythTV without OpenGL support is a possible solution, but  
since you've installed from RPMs that might be difficult.

The newer versions of MythTV  have an option to disable VSync, but I  
don't think you have that option with 0.18.1.

You say playback is "perfect" with the nv driver, is there some  
reason you need the nVidia ones? or, like me, does it just "bother"  
you that you can't use them?