[mythtv-users] No Display

Jay Ashworth jra at baylink.com
Sun Feb 6 15:39:16 UTC 2011


----- Original Message -----
> From: "Andre" <mythtv-list at dinkum.org.uk>

> Sounds like the TV is the issue then, it's a long shot but if you are
> running nvidia v260 drivers it might be worth trying the two different
> output modes now available. RGB is the default but YCrCb is now
> selectable in nvidia-settings. I've seen various TVs behave quite
> differently when given YCrCb instead of RGB (sometimes called TV mode
> rather than PC mode, although there's a little more to it than just
> this).

To me, off hand, this sounds like: 

The TV expects that the bitstream on the HDMI cable will always include a 
video *and* an audio stream, *even if there's no audio in that stream*, and
the video card on the PC *isn't generating an audio stream*, unless there's
actual, y'know, audio to put there.  Therefore, the TV intemperately refuses
to display the perfectly good video.

Finding a way, probably in the Xorg screen config, to force that card to
send an audio stream all the time, will I think be the solution...

if it's possible.  The people who work on the drivers for the card you have
are probably the best people to be asking: this is probably going to be a
general problem.

It's also possible there might be a hidden knob on the TV to stop this 
problem, though your TV manufacturer's tech support people probably won't
know about it.

Cheers,
-- jra


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