Force xorg-video-intel to use Modeline 1080p

[Stefan Keir Gordon]

On a high level, I am trying to make a mac mini intel display 1920x1080 over
DVI.

Using Ubuntu Gutsy Gibbon, xorg-video-intel driver, hdmi->dvi cable to 1080
projector.

The projector (pt-ae2000u) gives invalid EDID readings, at completely wrong
resolutions, this is a known issue.

The intel driver (apparently) refuses to use my modeline, resorting either
to a default resolution or the EDID resolutions.

You can see how the EDID comes back invalid:
(II) intel(0): Printing probed modes for output TMDS-1
(II) intel(0): Modeline "1920x540"x120.1   74.25  1920 2008 2052 2200  540
542 547 562 interlace +hsync $
(II) intel(0): Modeline "1920x540"x100.1   74.25  1920 2448 2492 2640  540
542 547 562 interlace +hsync $

Of course 540 is not the correct vertical resolution, altho the intel driver
starts X up at this resolution (I can log in via VNC)

xorg.conf sections look like this, you can see i'm trying 720 or 1080, no
mention of either of them in xorg.0.log:

Section "Monitor"
        Identifier      "dvi"
        Vendorname      "Panasonic"
        Modelname       "PT-AE2000"
       modeline  "1280x720 at 50" 60.47 1280 1328 1456 1632 720 721 724 741
-hsync +vsync
        Modeline "1920x1080" 148.5 1920 1960 2016 2200 1080 1082 1088 1125
-hsync +vsync
        Gamma   1.0
EndSection

Section "Screen"
        Identifier      "Screen 0"
        Device          "Intel Corporation Mobile 945GM/GMS/940GML Express
Integrated Graphics Controlle$
        Monitor         "dvi"
        Defaultdepth    24
        Option          "SecurityTypes" "VncAuth"
        Option          "UserPasswdVerifier"    "VncAuth"
        Option          "PasswordFile"  "/root/.vnc/passwd"
        SubSection "Display"
                Depth   24
                Virtual 1920 1080
                Modes           "1920x1080" "1280x720 at 50"
        EndSubSection
EndSection

Section "ServerLayout"
        Identifier      "Default Layout"
  screen 0 "Screen 0" 0 0
        Inputdevice     "Generic Keyboard"
        Inputdevice     "Configured Mouse"
        Inputdevice     "stylus"        "SendCoreEvents"
        Inputdevice     "cursor"        "SendCoreEvents"
        Inputdevice     "eraser"        "SendCoreEvents"
EndSection

Thank you in advance! I intended to figure this out and blog about it for
other users, but after a week I still have no solution.
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