I have a computer which has a Matrox G400 in it, which is a dual-head video card.

I recently did a FC4 > FC5 reinstall. I had Xinerama working beautifully in FC4, and I would like to get it working again. The Matrox driver reported that it did not support my current version of X server.

I ran system-config-display, and enabled the dual-head capabilities. Unfortunately, it did not work. The second monitor remains in sleep mode, and the virtual desktop remains within the borders of the primary monitor.

I tried to manually edit the xorg.conf file, but it did not help.

Does anyone have experience with dual-head Matrox cards in Fedora Core 5?