Force xorg-video-intel to use Modeline 1080p

[Maarten Maathuis]

Maybe some kind of reduced blanking modeline?

Maarten.

On 2/10/08, Stefan Keir Gordon <keir at keirgordon.com> wrote:
> 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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