X configuration questions

belrpr · Guru Joined: 22 May 2006 Posts: 440

Hi,

I have some X related questions:

How can you find out what your "DisplaySize" of a 26" (16:9) television is
How can I make that my television gets signals from X when my televesion is set on after the boot progress.

NeddySeagoon · Posted: Tue Oct 31, 2006 10:40 am Post subject:

belrpr,

The 26" is the TV diagonal tube size if its a CRT or actual picture size for a LCD.
CRTs will have an image diagonal between 1" and 1.5" less than the stated size.

In the example - I will assume LCD, so we have a 26" diagonal with a 16:9 aspect ratio.
Appling Pythagorous Theroum D^2=H^2+V^2 where ^2 means squared

D^2=26^2 which is 676
H^2 is 16/25 x D^2 or 432.64
V^2 is 9/25 x D^2 or 243.36

Taking square roots H=20.8 and V=15.6 but thats inches and xorg.conf wants millimetres, so multiply by 25.4
H is 528 mm and V=396 mm. Those are the numbers for xorg.conf for a 16:9 display with a 26" diagonal viewable screen.

Exactly how you make TV Out work depends on your graphics driver.
They all have their own names for the options you need.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

belrpr · Guru Joined: 22 May 2006 Posts: 440

NeddySeagoon · Posted: Tue Oct 31, 2006 4:19 pm Post subject:

belrpr,

I'v not set up TV out on an nVidia card but I do know its covered in detail in the readme which you can find on the nvidia site or in /usr/share/doc/nvidia-drivers-<ver>/README.gz

One thing that is not covered there is the use of a modeline to describe your TV video format to Xorg. Modelines are required for all non VESA standard video formats.