[mythtv-users] Driving a PAL tv using Intel graphics

Paul Gardiner lists at glidos.net
Tue Aug 23 12:54:25 UTC 2011

On 23/08/2011 13:19, Alex Butcher wrote:
> On Tue, 23 Aug 2011, Andre wrote:
>> On 23 Aug 2011, at 12:25, Paul Gardiner wrote:
>>>> I noted after I posted that the user questions say it was designed for a
>>>> Radeon, which suggests it may not be the same as Steve Hall's circuit after
>>>> all. It'd be a good, tidy base to hack from, though.
>>> It says that it can take RGBHV in and output composite sync on pin 19
>>> so should work fine with either ATI or nVidia.
>> You still need to output interlaced video, something that Nvidia always seem to have problems with.
> Over the video output port, maybe.
> However, with the VGA port, no problems with that since mid-8000 series
> drivers for my MX440.  The X desktop was interlaced just fine.
> However, interlaced /XVideo/ only started working on my recent MythTV
> 0.24-fixes+Fedora 14+256.53 drivers+7600GT/7600GS rebuild. On my old system,
> each scanline was doubled, halving the vertical resolution, so it looked a
> bit like an old VHS recording.

Ah that's it. It was XVideo that was the problem. Glad that's fixed.

> nVidia still managed to do better than ATI, though - with all the ATI cards
> and drivers I tried, interlaced Xv output was even worse. The most amusing
> was when the combination I was using resulted in the top half of the frame
> being stretched vertically to the full frame height. Unusable.

I've had several ATI cards and onboard chips work fine, but only using
the opensource "radeon" drivers, not ATI's own or radeonhd.


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