Force xorg-video-intel to use Modeline 1080p

[Stefan Keir Gordon]

Fantastic!  It didn't work exactly as expected.  Oddly enough after adding
the preferredmode the driver indicated that it found that mode via probing,
but regardless, it was now available.

Now I am just having a small issue though, my display is shifted about 5% to
to the right of the screen.  Is this a hsync/modeline issue?  I can't find
an obvious way to correct it via randr.

I have exact specs for my display but I have had trouble constructing a
modeline.  When using the resolution/sync values for the display, the
calculated dot clock frequency is much higher than the specs say it should
be.

>From my documentation:

1920x1080 at 60 should be 67.5 horizontal, 60 vertical, 148.5 dot clock

But all calculators come up with a dot clock in the 177 range for those
values, presumably using the wrong porch sizes?  Any ideas?

On Feb 9, 2008 10:29 PM, Alan W. Irwin <irwin at beluga.phys.uvic.ca> wrote:

> On 2008-02-09 21:04-0800 Stefan Keir Gordon wrote:
>
> > The intel driver (apparently) refuses to use my modeline, resorting
> either
> > to a default resolution or the EDID resolutions.
>
> In the Display subsection, modes are entirely ignored by the Intel driver
> in my experience.
>
> With the Intel driver I find the only way I can set the mode from
> xorg.conf
> rather than the xrandr application (xrandr might actually be a better
> option
> for you if you are going to change to a projector on the fly) is to use
> Option "PreferredMode".  Here is an example from my own xorg.conf (all in
> the Monitor section).
>
> Modeline "1024x768_85.00"  94.39  1024 1088 1200 1376  768 769 772 807
> -HSync +Vsync
> Option "PreferredMode" "1024x768_85.00"
>
> I then get 1024x768 with an eye-soothing 85 Hz vertical refresh for my CRT
> monitor.  Without the above I get a mode chosen semi-randomly by RandR
> with
> a 60Hz vertical refresh that gives me an instant headache.
>
> BTW, I calculated the above modeline with "gtf 1024 768 85".
>
> Alan
> __________________________
> Alan W. Irwin
>
> Astronomical research affiliation with Department of Physics and
> Astronomy,
> University of Victoria (astrowww.phys.uvic.ca).
>
> Programming affiliations with the FreeEOS equation-of-state implementation
> for stellar interiors (freeeos.sf.net); PLplot scientific plotting
> software
> package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of
> Linux Links project (loll.sf.net); and the Linux Brochure Project
> (lbproject.sf.net).
> __________________________
>
> Linux-powered Science
> __________________________
>
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