[mythtv-users] colour control on VGA output?

Michael T. Dean mtdean at thirdcontact.com
Sat Aug 19 17:54:57 UTC 2006


On 08/18/06 04:41, Graeme Wilford wrote:

>On 17/08/06, Graeme Wilford <gwilford at gmail.com> wrote:
>  
>
>>I've just installed a new plasma screen and changed over from PVR-350
>>svideo output to ATI VGA output. However, my plasma screen doesn't let
>>me change the colour characteristics of its VGA input.
>>
>>[...]
>>
>>I'm using a Shuttle with onboard ATI 9100 IGP as frontend. MythTV
>>0.19-fixes, Xorg 6.8.2. Unfortunately, enabling Xv colour controls
>>within Myth simply screws the colours up when using either the Xorg or
>>proprietary ATI X drivers (8.27.10).
>>    
>>
>
>After investigating with xvinfo, I discovered that enabling Xv colour
>controls caused XV_HUE to be -1000 rather than the default of 0.
>Changing this to 0 (50% in Myth) gave me a good starting point where I
>could then reduce colour saturation to a nice 35%.
>
And, for completeness, there were recent changes to SVN that should fix 
this issue (using the wrong default for hue on ATI hardware).

Mike


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