[mythtv-users] Ahh - Evil xorg and modelines

[Tom Lichti]

Damian Surr wrote:
> Sorry if it looks like I've just posted the same long log file 3 times. 
> That's not the case. I was responding to 3 different branches of the 
> thread. I can imagine it being annoying if it doesn't look like that, 
> but thought it better than starting entirely different threads.
>   
I didn't scrutinize them close enough to see if they were the same.
> To answer your questions, I have a BenQ W100 projector connected to my 
> computer via a DVI-D to DVI-D cable. The projector is 16/9 and the 
> native resolution is 854x480
>
> My manual indicated that 'supported timing for PC input' includes the 
> following resolutions .. 640x400 640x480 800x600 1024x768 1280x1024. It 
> also supports 480i 480p 576i 576p 720i 720p 1080i 1080p
>   
I know, I downloaded the W100 manual to see what options there were. 
> Once I get any other resolution than 800x600 working on this projector, 
> then I can try a few resolutions to see what looks best. For the moment, 
> I thought it was best to stick with trying to get 1024x768 (I did try 
> modelines for all the other resolutions before deciding it was best to 
> focus on one first).
>   
Have you tried a 480p modeline as suggested in the MythTV Wiki:


      NVIDIA Driver ModePool

The latest NVIDIA drivers <http://www.nvidia.com/object/unix.html> of 
both the 9xxx and 8xxx series have a standard ModePool format that can 
be used to easily create a screen mode without the need of a modeline. 
For the best results you will want to make sure you have the proper 
*HorizSync* and *VertRefresh* values in your Monitor subsection.

The format is simple, 
/HorizontalResolution/*x*/VerticalResolution/*_*/frequency/

So the following line in your Screen subsection for your TV,

    Modes      "1920x1080_60" "1280x720_60" "720x480_60"

would yield 1080p, 720p and 480p outputs

    Modes      "1920x1080_60i"

would yield 1080i output.

These /*should*/ be compliant for DVI and component output on all TV's 
so its probably worth trying before playing around with EDID and custom 
modelines.


> As for your question of 'what aspect ratio mode and application mode do 
> you have the projector set to?' then unless the information above 
> provides the information I do not know as I don't understand the 
> question. The projector settings themselves have been left pretty much 
> at default factory settings.
>   
Your projector has settings for aspect ratio mode and application mode. 
I assumed you had read the manual to see what it can do. It may be that 
one of those settings is overriding what you are trying to do.

Tom