[mythtv-users] Possible XvMC prebuffering issues solution?

[Tom Lichti]

Steven Adeff wrote:
> On 11/30/06, Michael Tiller <michael.tiller at gmail.com> wrote:
>> On 11/30/06, Michael Tiller <michael.tiller at gmail.com> wrote:
>>> On 11/29/06, Steven Adeff < adeffs.mythtv at gmail.com> wrote:
>>>> On 11/29/06, Michael Tiller <michael.tiller at gmail.com> wrote:
>>>>> Just so I understand this, this implies that I should have a block like this
>>>>> in xorg.conf , correct? (not my previous modes)
>>> ...
>>>
>>>> give it a shot and let us know (make a backup of your old xorg.conf
>>>> just in case).
>>> I did.  X came back (in the log) and said it had never heard of the mode
>> 720x480_30.  I assumed this was some kind of built-in.  I'll have to add the
>> modeline manually but first I have to figure out what it should say.
>> OK, I looked here and I'm still confused.  Where did you guys get these
>> modelines from?  Can you post the 720x480_30 and 1024x768_30 modelines you
>> are using?  (I presume these are NVIDIA drivers to NTSC TV-out).
> 
> I'm basing it on the fact that 1920x1080_30, 1920x1080_60, and
> 1280x720_30 all work to give proper HDTV output resolution and
> frequency.  Try one of the NTSC modelines in the modeline database on
> the wiki.
> 

I got it from the Nvidida readme, but after reading it again, I think I 
just got lucky that it worked. I was going off this section:

***
Valid modes are given a unique name that is guaranteed to be unique 
across the whole mode pool for this display device. This mode name is 
constructed approximately like this:

     <width>x<height>_<refreshrate>

(e.g., "1600x1200_85")
***

I also just found a utility that is supposed to generate valide VESA 
modelines based on resolution and refresh rate. Search your system for a 
command called 'gtf'

Tom