Matrox G450 Dual Head

[Dana J. Laude]

On Wednesday 07 December 2005 11:43, Tom Marshall wrote:

> I did some investigating this morning and found that there is a
> version mismatch between the breezy xorg server and the binary MGA
> driver from the Matrox site.  Some googling turned up this page:
>
>   http://ubuntuforums.org/archive/index.php/t-78288.html
>
> The post from _cato on 10-31-2005 explains how to solve the
> problem: fetch and unpack the xserver-xorg-driver-mga package, copy
> the included mga_drv.o into your active system, and restart X.
>
> This seems to work for both 16-bit and 24-bit depths.
>
> Also note that I have VGA outputs, I don't use DVI.

I found that the other night also, or something similar.  I grabbed 
the drivers off of the matrox site and have them installed and 
working just fine.  I went through the xorg.0.log and it shows the 
mga_hal driver also loading fine, along with dri.  BUT running the
glxinfo test still shows dri is not enabled. (?)

I also read that having Option "Xinerama" "on" can have a ill effect 
on dri.  Tried it both ways, but it doesn't seem to matter. I do know
that adding the Option "AGPMode" "4" under the section Device does 
work.  This issue has been around a number of years now.  What 
happens is that it puts  the AGP card into 2x by default... you have
to force it to 4x.

As far as DVI output, mine has VGA also.  

I really think this might boil down to compiling a custom kernel.  
I'll have to grab the source and see how it's setup, specifically the 
mga options and such.

Dana