[mythtv-users] Trying to get XVMC to work.

[stuart]

Mitch Gore wrote:
...<cut>...
> 
> Can you post your /etc/X11/xorg.conf file.
> 

And that's where the problem was (might have been).  The CPU has dropped 
from about 92% to 56% and play back of a 1080i ATSC station is doing 
fine (i.e. no stuttering).  Playing w/it some more I see where I might 
still need some tweaking (I see some stuttering on a 720p station).  I 
think I need to change the profile from "cpu--" to something that uses 
XVMC for the 720p stations (hum, I was hoping not to do that as XVMC 
makes editing programs difficult).

Here's the last set of changes I did before live HD ATSC video started 
working...

dewey:/etc/X11# diff xorg.conf xorg.conf.20080422
86,88c86
<     Option "UseEvents" "true"
<     Option "XvmcUsesTextures" "false"
<     Option "NVAGP" "1"
---
 >     Option "XvmcUsesTextures" "true"

...basicly, I tried to follow the wiki Kevin said to use line for line 
(http://www.mythtv.org/wiki/index.php/XvMC).  The wiki wording left me 
wondering the first time through if I should do what it inferred: 
"Placing these options in the "Device" section of xorg.conf can also 
affect usage or performance".  It's talking about the above changes. 
After the changes, things started to work.  Here's the parts that may 
also be of interest to other posters w/similar problems...

I am running a Debina/Unstable system at about 3GHz w/1GByte memory. 
There is an Nvidia 6000 type video card connected to a 20" LCD monitor 
by the VGA cable.

I am using the default "CPU--" profile in the mythtv setup menus.  The 
graphics are color on NTSC and SD ATSC stations.  When watching HD ATSC 
stations of 720p or 1080i the graphics are in black and white (probably 
a good indication when XVMC is actually being used).

I need to do more fixing, the audio doesn't work for all formats, but 
this is a good start.

...thanks everyone