[mythtv-users] Troubleshooting a VGA-SCART converter

Mike Perkins mikep at randomtraveller.org.uk
Sun Oct 2 16:38:36 UTC 2011

On 02/10/11 16:44, Simon Jones wrote:
>> I suspect the first problem is that the scan frequencies are simply too
>> high - X doesn't seem to accept the 15.6kHz modelines (from
>> http://www.mythtv.org/wiki/Modeline_Database) but will use the 31kHz
>> non-interlaced modes - hopefully this will actually work as the TV can
>> supposedly take 100Hz progressive input.
> The card will not be getting any EDID data, so i'd look for the option
> of ignore EDID
> and see if that then will allow you to set your modelines correctly.
>> I'm also trying to get hold of a CRO to test what's going on, but I'd
>> like some advice on what to do - should I
>> a. persist with/modify the circuit (e.g. to sync-on-green?)
>> b. buy a VGA-composite converter
>> c. buy a suitable NVIDIA card (e.g. 8600GT)&  use either VGA/SCART or
>> S-Video
>> d. give up and buy a new TV
>> e. something else?
> That depends on if your just trying not to spend money because you
> think the VGA will give a suitable quality picture or if you have no
> money to spend.
> Different videos / TV have different frame rates so you'll not be able
> to sync the tv frame rate with the content so you will always get a
> slight stutter, personally a TV with HDMI input and allowing
> 24/50/60Hz frames will be a lot better and give better results.
A lot of modern TVs also have a VGA input, which may make your choice easier, 
when you eventually get around to it.


Mike Perkins

More information about the mythtv-users mailing list