problem activiting second screen for Matrox G450 dual-head PCI card

陈士成 c.shicheng at
Tue Jun 6 07:30:47 PDT 2006

After looked into Matrox support forum (actually this question should go to
that forum perhaps, though I am not sure if I am on-topic by sending to this
list) a Matrox support stuff said the user should use the driver they
released if dual-head feature is needed. He/she was talking about G450 MMS
("You need to use the matrox beta driver to make an MMS card work."), but I
got no way to tell if I have a MMS card, at leat this is not written on the

Matrox didn't release a driver for Xorg 6.9.0, trying the driver for
6.8.2(latest) gives a lot of Unresolved symbol error. There is an i810
card but never activated in the BIOS so I guess that is not causing this

2006/6/6, 陈士成 <c.shicheng at>:
> Hello. Using Xorg 6.9.0 on SuSE 10.1 I am not able to bring up the second
> screen of Matrox G450 dual-head card.
> The card sits on PCI:4:0:0. (Some other dual-head card, e.g. some
> dual-head Cirrus Logic card, shows up on two separate PCI busID). X run on
> the first screen okay. The second card, using almost same setting in
> xorg.conf Device section except "Screen 1",  cannot start X server with
> this error message:
> #  X -config xorg.conf.test_second_head
> ....
> (WW) MGA: No matching Device section for instance (BusID PCI:4:0:0) found
> (EE) Screen 0 deleted because of no matching config section.
> (EE) Device(s) detected, but none match those in the config file.
> The funny thing is, it's being said "Screen 0 deleted because of no
> matching config section.", However on the xorg.conf I prepared for testing
> the second head, there is no "Screen 0" line (only a line "Screen 1").
> I attached both xorg.conf.test_second_head (the file I use to test the
> second head) and the Xorg log.
> Any hint? Thank you in advance!
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