x86emu fails when fetching monitor data (INVPLG instruction?)

Julien Cristau jcristau at debian.org
Fri Sep 21 04:15:03 PDT 2007

On Thu, Sep 20, 2007 at 20:13:15 -0700, Nolan Check wrote:

> I own a Toshiba Tecra 8000 laptop. The display device is a NeoMagic
> MagicGraph256AV, which uses the NM2200 chipset. The monitor goes up to
> 1024x768. When I install Xubuntu Gutsy Tribe 5 (with latest updates), it
> fails to detect the screen resolutions properly. It maxes out at 640x480
> until I adjust the HorizSync and VertSync parameters in /etc/X11/xorg.conf.
> The reason for this seems to be that X.Org fails to call the video BIOS
> function to get monitor data. (See attached /var/log/Xorg.0.log)
> During the VBE DDC transfer, it gets "01 ILLEGAL X86 EXTENDED OPCODE". That
> indicates the opcode "0F 01", correct? The INVPLG instruction.
Looks a bit like https://bugs.freedesktop.org/show_bug.cgi?id=11842 .
See also http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=404885#46


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