[mythtv-users] Jerky panning all cards and resolutions. Thoughts on where to look?

[John]

Daniel Kristjansson wrote:
> On Mon, 2007-05-14 at 16:32 -0400, William Munson wrote:
>   
>> Hi Listland,
>>
>> Since day one I have noticed that panning scenes have a distinct 
>> "gallop". This is independent of video mode, resolution, signal source, 
>> real time setting or rendering method. On about a 1/2 to 1 second cycle 
>> the pan will speed up and slow down in a repeating pattern. Nothing I 
>> have tried has fixed the problem. I dont think this is related to cpu 
>> usage as it happens even when playing SD which results in an average 
>> usage of about 12%. HD playback is 50-55% usage. The box is a dedicated 
>> myth system with a 2.8GHz AthlonXP mobile with plenty of memory. Signal 
>> sources are 2 pvr-250's and a HDHR. Video card is a NVidia FX5200 using 
>> the standard VGA output to drive my HD monitor. This has happened since 
>> myth 0.19 and is present in 0.20, 0.20.1 and SVN so I doubt its myth 
>> itself. Any suggestions on what else to check?
>>     
>
> It is probably your V-Sync method. Try OpenGL V-Sync and make sure you
> disable "Sync To VBlank" in nvidia-settings for both
> the "Video Texture Adaptor" and the "Video Blitter Adaptor"
> under "X Server XVideo Settings". If that doesn't work try the
> other V-Sync methods, but make sure the "Sync To VBlank"
> settings are enabled.
>
> -- Daniel
>
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> "Sync To VBlank"
>
>   
Daniel,

Do you mean disable or enable

"Sync To VBlank"

or do you only disable when you dont use OpenGL ??