Hello,

I am trying to configure Xorg to properly output a high-definition widescreen display for my Samsung LN-S4695D 46" LCD TV.

The problem I'm running into is that I seem to be unable to properly pull EDID data down from the television, so I'm going to need to manually configure a Modeline to display... and after much research I've been unable to determine one that will properly work.

Ideally, I would like this output to display in 720p (as my video card is a low-power fanless card). But a Modeline for 1080p (for testing purposes) would be greatly appreciated as well.

I'm not sure what other information I need to give, but any help with this issue would be hugely appreciated.

Thanks!

I don't have the proper modeline for your TV. I'm not sure how helpful I can be but what kind of video card? nvidia? ATI? Intel?

The reason I ask is that the nvidia (binary) driver supports "TV modes". So you don't need a specific modeline. I have 3 client myth boxes that use these tv modes. Two are connected via DVI-D->HDMI that are 720p to Vizio LCD TVs and the other is 1080i over component to a 2001 Mits Rear projection. I was happy it was so easy to connect to the old mits because finding the proper modeline didn't sound like fun.

See the mythtv nvidia page in the wiki (http://mythtv.org/wiki/index.php/NVidiaProprietaryDriver) for some details. Also Modeline Database (http://http://mythtv.org/wiki/index.php/Modeline_Database) talks about it. It doesn't have your TV and you probably already know about that page but I thought I would throw the link in anyway.:)

I'm not familiar with getting an ATI or Intel chipset working with X on a TV. Personally I would be concerned with burning out the set with a bogus modeline but then again I'm also afraid of spiders! :D

I'd try the standard ATSC-defined modes (which your TV should accept, as that's what a set top box will send it):

#ModeLine "ATSC-720-59.94p" 74.176 1280 1320 1376 1650 720 722 728 750
#ModeLine "ATSC-720-60p" 74.25 1280 1320 1376 1650 720 722 728 750
#ModeLine "ATSC-1080-59.94i" 74.176 1920 1960 2016 2200 1080 1082 1088 1125 Interlace
#ModeLine "ATSC-1080-60i" 74.25 1920 1960 2016 2200 1080 1082 1088 1125 Interlace
#ModeLine "ATSC-1080-59.94p" 148.352 1920 1960 2016 2200 1080 1082 1088 1125
#ModeLine "ATSC-1080-60p" 148.5 1920 1960 2016 2200 1080 1082 1088 1125

or the "PC-tweaked" versions:
#ModeLine "ATSC-720-59.94p" 74.086 1280 1320 1376 1648 720 722 728 750
#ModeLine "ATSC-720-60p" 74.16 1280 1320 1376 1648 720 722 728 750
#ModeLine "ATSC-1080-59.94i" 74.176 1920 1960 2016 2200 1080 1082 1088 1125 Interlace
#ModeLine "ATSC-1080-60i" 74.25 1920 1960 2016 2200 1080 1082 1088 1125 Interlace
#ModeLine "ATSC-1080-59.94p" 148.352 1920 1960 2016 2200 1080 1082 1088 1125
#ModeLine "ATSC-1080-60p" 148.5 1920 1960 2016 2200 1080 1082 1088 1125

JustGags,

I'd try this to see what EDID info gets pulled from the TV, I could not get any other method to pull EDID info from my TV. This will also give you ideas why a particular modeline does not work ... my problem turned out to be that dotclock for my Nvidia FX 5200 was not high enough to handle 1080p (over DVI - HDMI).

startx -- -verbose 6 -logverbose 6 2> /tmp/startx.log

I hope this helps...

In case anyone comes across the same problem here's my solution:

The VGA cable I was using, apparently was not manufactured with all the pins needed to transmit the picture and EDID information. Once I switched to a VGA cable w/ all the pins, everything worked automatically, like it should.

:D