You wrote (in your message from Friday 26)
 > Hello,
 > 
 > I just upgraded from a Matrox Millenium PCI to a G450, and am having a
 > difficult time getting X working. I've tried xfree86 3.3.6 (from
 > ftp.netbsd.org) and 4.0.2 (from ftp.xfree86.org) to no avail. I'm using a
 > Sony GDM-200PS [1], which worked fine on the Millenium at 1152x864.
 > 

The mga driver in XFree86 4.0.2 doesn't support the G450. You can
however use the Linux driver provided by matrox. 
Just download the mg_drv.o for linux from 
<http://www.matrox.com/mga/support/drivers/files/linux_04.cfm> and
copy it in /usr/X11R6/lib/modules/drivers. 

The XFree86 4 drivers are designed to be OS independant. 

BTW Matrox now makes the source for their driver available too. 
-- 
					Matthieu