Steve Adeff wrote:
On Tuesday 27 December 2005 18:38, Len Reed wrote:
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
problems:
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?
Details:
Fedora core 4, x86_64
Athlon-64x2 (3800+)
ndvidia 6200 card
latest nvidia X driver, compiled on the machine
Thanks,
Len
newer nvidia drivers don't support interlace modes over DVI.
Seriously?? I sure didn't see that in their README. After my original
posting, I bought (from somewhere that I can return it) a 6600 card that
has component video out and it works fine. (It exhibited exactly the
same problem with DVI, though.) The card with HDTV encoding is a
satisfactory solution if not an ideal one (both technically and in
cost.) It sure seems stupid to have the card encode HDTV to have the TV
turn it back into digital for the DLP display when I should be able to
do it over DVI. Certainly the cable box's 1080i DVI is a bit clearer
than its component video. Is there any way that the open source (dv)
driver will work at 1920x1080i to DVI or is a waste of more time to even
try?
Overscan won't change what you see for TV (ie. the overscan is the same
whether from your computer or your cablebox), so change the gui overscan
settings for your TV to fix the gui. if you want to fix tv video, SVN lets
you adjust overscan, or find the service menu info for your tv to lessen its
overscan.
OK, I haven't laid mythtv into this mix yet, so I'll worry about it
then. The component video from the new card at 720p and 1080i exhibits
only small overscan, about what I'd want.
While you're listening, Steve, you were complaining about the VIA
IEEE1394 chipset. I can't find anything but VIA. Fry's had a dozen
cards, all VIA. Did you have to mail order to get something with the TI
chip? Do you have a recommendation?
Thanks again for the help.
Len
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