[mythtv] DRM VSync

Ivor Hewitt ivor at ivor.org
Fri Apr 1 15:08:33 UTC 2005


Ivor Hewitt wrote:
> Doug Larrick wrote:
>>
>> Looking at the code... refresh rate comes from the videoout method, not
>> the vsync method.  Unichrome uses XvMC, right?  I can't see anything
>> weird in Myth's computation.  What does xvidtune say about your vertical
>> sync rate?
>>
> 
> Hi Doug,
> I'm not at the machine at the moment so I can only report the console 
> output of xvidtune which might not be that useful:-
> 
> # xvidtune
> Vendor: Monitor Vendor, Model: NEC LCD1850X
> Num hsync: 1, Num vsync: 1
> hsync range 0:  31.00 -  82.00
> vsync range 0:  50.00 -  85.00
> 
> # xvidtune  -show
> "1280x1024"     0.00   1280    0    0    0   1024    0    0    0
> 
> Hmmm, could that be the problem? The driver is using a synthetic 
> modeline which isn't fully populated?
> 
> Regards,
> 

2005-04-01 16:05:28.944 Video timing method: DRM
2005-04-01 16:05:28.945 Refresh rate: 13328, frame interval: 40000

Yay. Thanks for the tip Doug, forcing the driver to use a real modeline 
and we have smooooooth video. Magic.


-- 
Ivor
http://www.ivor.it


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