I have found a workarround to use the `mga' driver again: I activated
the kernel framebuffer interface in the device section of the X.org
configuration file /etc/X11/xorg.conf (Option "UseFBDev" "true").
Section "Device"
Identifier "Matrox Graphics, Inc. MGA G200"
Driver "mga"
BusID "PCI:1:6:0"
Option "UseFBDev" "true"
Option "OldDmaInit" "True"
EndSection
I haven't tested it with the default ubuntu kernel, but with my self-
compiled 2.6.18-rc6, I had to load the `matroxfb_base' before starting
the X-Server. If you compile the matrox framebuffer into the kernel, you
shouldn't notice any problems. If you have compiled it as a module, you
should add `matroxfb_base' to your /etc/modules file.
--
Matrox MGA200 doesn't work after upgrade from Dapper to Edgy
https://launchpad.net/bugs/58721
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