Matrox Millenium G450 won't run dual screens in 7.3

Kevin Oberman oberman at
Wed Sep 26 12:51:00 PDT 2007

Since updating my old desktop with an MGA450 card and two display heads,
I no longer have working Xinerama. I see the same things on both
displays. It was working fine in 7.2.

I have tried both with and without mga_hal installed and see no

Additionally, when I start up Gnome, things often seem to hang with the
window manager running, but no gnome-terminals or panels on the screen
and the background not loaded.

I don't know that these are related, but I suspect they might be.

The only error in the Xorg.0.log is:
(EE) MGA(0): [drm] DRIScreenInit failed. Disabling DRI.

The log shows the following layout:

(==) ServerLayout "XFree86 Configured"
(**) |-->Screen "Screen0" (0)
(**) |   |-->Monitor "Monitor0"
(**) |   |-->Device "Card0"
(**) |-->Screen "Screen1" (1)
(**) |   |-->Monitor "Monitor1"
(**) |   |-->Device "Card1"
(**) |-->Input Device "Mouse0"
(**) |-->Input Device "Keyboard0"
(**) Option "Xinerama"
(==) Automatically adding devices
(==) Automatically enabling devices
(**) Xinerama: enabled

But the remainder of the log never shows anything about MGA(1); only
MGA(0). No errors or anything else to indicate what might be failing to

Any suggestion of any way to get this running would be greatly
appreciated. If anyone has a G450 (or G550) working with 7.3, I'd also
like to hear about this.
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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