[PATCH] xfree86: Add quirk for Acer AL1923 monitor

[Adam Jackson]

On Mon, 2009-02-09 at 17:18 +0100, Tormod Volden wrote:
> On Mon, Feb 9, 2009 at 11:54 AM, Julien Cristau <jcristau at debian.org> wrote:
> > On Sun, 2009-02-08 at 22:36 +0100, Tormod Volden wrote:
> >> From: Tormod Volden <debian.tormod at gmail.com>
> >> The monitor reports aspect ratio instead of image size in the detailed
> >> timings. https://bugs.launchpad.net/bugs/320930
> >> Thanks to Sorin Enache for testing.
> >
> > Hi Tormod,
> >
> > Why is this needed on top of 0660dd9d7009147c395b9ea904539f76f55b9a7f?
> >
> > Cheers,
> > Julien
> >
> 
> The 0660dd9d7009147c395b9ea904539f76f55b9a7f checks the "Max Image
> Size" i.e. DDC->features.hsize for typical aspect ratios. OTOH, this
> monitor reports "Max Image Size" correctly, but puts the aspect ratio
> in the detailed timing "Image Size" i.e.
> det_mon->section.d_timings.h_size. So it's the other way around.

Oh, fun.

I suspect we could fix this more generally without quirking each
monitor.  I assume we're willing to accept that no one's going to make a
display that's 0.25cm^2.

Something like the attached patch, maybe?  Still doesn't handle the case
where you've got a global size of 0x0 and per-mode sizes corresponding
to aspect ratio.  I've never seen a case like that, but I could imagine
it for a projector that can do multiple scanout aspect ratios.

- ajax
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