[Bug 3731] Re: Xorg resolution falling back to 640x480 and/or 800x600 when h/v freqs incorrect

[Checkmate]

This is already reported: Tecra 8000 laptop video (Neomagic
MagicGraphAV256 with NM2200 chipset) automatically detects as only
640x480. I can fix that by setting HorizSync and VertSync in
/etc/X11/xorg.conf. Then the fonts are way too small, so I fix that by
setting a workable DPI value. I think the reason it fails is that it
finds "01 ILLEGAL X86 EXTENDED OPCODE" in the Video BIOS while it's
trying to read EDID data (a message in /var/log/Xorg.0.log). So the
opcode is "0F 01", the INVPLG instruction. I looked in the source code
for the X.Org "int10" driver where this error message is printed; there
is no implementation for INVPLG (it's a privileged instruction). Now if
I knew how to compile my own X.Org, I would fix that. I think an
acceptable solution is to simply ignore the opcode.

I suppose I should tell all this to whoever wrote the code!

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Xorg resolution falling back to 640x480 and/or 800x600 when h/v freqs incorrect
https://bugs.launchpad.net/bugs/3731
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