[mythtv-users] 1920x1080i source on 1920x540p output, video is narrow

[John Patrick Poet]

On Wed, 7 Apr 2004, Henk Poley wrote:

> Op woensdag 7 april 2004 18:29, schreef Daniel Walton:
> > On Wed, 7 Apr 2004, John Patrick Poet wrote:
> > > On Wed, 7 Apr 2004, Daniel Walton wrote:
> > > > When I use the 848x480 or 960x540 modelines I can get the video to come
> > > > out ok but if I use the 1920x540 one mythtv displays a very narrow
> > > > picture.  On my 65 inch tv I must have a 15 inch black bar on the left
> > > > and right sides of the picture.  <snip>
> > > >
> > > > Am I missing something obvious or is myth just going nuts on me?  I'm on
> > > > the latest CVS of myth with danielk's HDTV patches applied and I have a
> > > > nvidia GF4 MX440 video card.
> > >
> > > Have you used the "DisplaySize" option in the monitor section of your
> > > XF86Config file?  It takes two values in millimeters which indicate the
> > > physical size of your display.  X and Myth figure out your display aspect
> > > ratio from these values.
> >
> > I haven't tried that yet but I will.  Do I need to get my modelines
> > perfected first so that the desktop correctly fits the screen or should
> > that matter at all as far as this issue is concerned?
>
> The DisplaySize setting only affect the dots-per-inch X uses for various
> things like fonts. You problem is more like a modeline problem, not font size
> (isn't it?).
>
> Didn't you find any HDTV modelines for the GF4MX440 on the internet?


You are correct.  After futher reflection, his problem probably does have to
do with the modeline.

Here is what I use (thanks to Doug Larrick):

# 960x540 progressive, pseudo-1080i
Modeline "540p" 39.956 960 1020 1100 1184 540 550 551 563 +hsync +vsync # 39.956 MHz 33.75 kHz 59.94 Hz

# 1920X540 progressive, pseudo-1080i, 2x 540p's H timings
Modeline "540pw" 79.912 1920 2040 2200 2368 540 550 551 563 +hsync +vsync # 79.912 MHz 33.75 kHz 59.94 Hz


John