I have a 32" JVC LCD TV I am trying to mate up with a linux box that includes a GeForce 6200 via the component dongle. The resoluion on the TV is 1366x768.

How can I find out the max HorizSync value for the TV in xorg.conf? Its not in the manual, or anywhere i can find online. I am playing with values that allow me higher and higher resolutions. What happens if I go to far, will the TV fry or just not display until changed back? What is a ypical ax number for a 32" LCD?

Also, everything is blue. Whats up with that?

Might be able to pull that info from the windows drivers inf file.
If you have hooked up to a windows computer is there any On Screen Display info?

What do you mean it is blue?

Brian1

Thanks for the reply, but I don't have an available windows machine that is capable of component out (and a VGA to component cable is not cheap).

I found the refresh time for the TV is 12 msec, which is a horizontal refresh rate of 83 Hz. (Probably actually 80 Hz, which is a refresh time of 12.5 msec - and JVC rounded down to make their spec look a hair better). Is that the same thing as HorizSync?

The whole screen displays in shades of blue & no other colors I think the card is pushing all the video information throught the blue cable of the RGB component hook-up. I get somewhat better results when I change the xorg.conf in the Device section: "TVStandard" "1080i" - I get colors, but it displays in 1024x768 and doesnt use very much of the screen real estate (any other setting for this option gives me Major troubles)

To sum up the question: Does anyone have any experience with getting 1368x768 (or 1360x768) out of a nVidia card on their linux box (preferrably through component cable)?

80Hz is very low for a horiz sync, so no, it's not. It's the vertical refresh.

Don't know if the following will help.

For television (composite video) in general:
A screen 'consist of' 625 lines (PAL) or 525 lines (NTSC). It's refreshed at respectively 50Hz and 60 Hz (vertical refresh).

This means that there are 50x625 = 31250 (or 60x525 = 31500) lines drawn in one second. As TV uses interlaced video, it will build the screen in two cycles (odd field and even field) and the values must be halved. This gives horizontal syncs of 15625 Hz (PAL) and 15750 Hz (NTSC).

Computer monitors don't differ much:
1368x768 implies 768 lines. With a refresh of (let's say) 60 Hz this gives 60x768 = 46080 lines per second.
As it's usually not interlaced, there's no need to divide by 2, so this is the horiz sync (in Hz).

[edit]
You might have to fiddle slightly with the calculated values; I once had to put in a slightly higher value (approx 3%) to get the required resolution.
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Please note that those values are in Hz, not kHz.

BTW It's composite out, not component


PS it usually helps if you post make and type of the screen