[mythtv-users] Struggling with Xwindows DVI to HDTV 1080i
crunchyfrog at charter.net
Tue Dec 27 18:38:26 EST 2005
I've got an nvidia 6200 with DVI out connected to my Mitsubishi HDTV
(DVIS to HDMI cable). The TV does 720p and 1080i on HDMI: it's worked
from both the cable box and from a DVD player that does upscaling.
I can get the TV to recognize that it's getting 1080i input from the
computer. (The info on the screen says so.) I can't get it to deal
with 720p for some reason. I can get the TV to handle lower resolution
SVGA and XGA modes up to 1024x768 fine.
With 1080i I get what is close to the twm screen, but there are two
1. The screen is greatly overscanned. Perhaps 20% is not displayed.
2. The interlacing is off, or at least that's my guess. Everything is
displayed twice, with one flickering image directly below another. They
are close: the bar at the top of an xterm has its two images overlapping.
I've tried every modeline I can find, and have tried two different
modeline calculators, but I can't get the two images to converge. The
TV seems to be reporting things correctly to X (59-61 Vsync, reasonable
Hsync, etc.) Telling X to ignore the TV's info doesn't help in any case.
It seems like it should be easy enough to play with the vertical
blanking interval to fix this, and that I'm close. But I'm guessing,
and I'm not making progress. Is there a reasonble way to tweak the
modeline to iterate toward a solution here?
Fedora core 4, x86_64
ndvidia 6200 card
latest nvidia X driver, compiled on the machine
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