Originally posted by neville310
Please understand that I am a complete Linux newbie. My goal is to get my system up and running. I have many questions since I am not familiar with the terminology or configuration files on Fedora Linux. Thus Google results often do not provide the full picture for me resolve my configuration issues.
[ Question 1 ]
After setting my dualhead display and logging off, FC4 still does not activate my second monitor.
Desktop > Systems Settings > Display
After press OK, a information dialog prompts me.
“Display settings changed
You need to log out and restart the X server for the changes to take effect.
Configuration was written to /etc/X11/xorg.conf, original configuration saved as /etc/X11/xorg.conf.backup.”
My Google searches led me to believe that my video card, a G400, should work with no problem. Yet I did not understand the HOW-TO part; HOW-TO edit the config file; or even locate it.
How do I restart the X server?
Typically with the command startx.
To get dual monitors working with the G400, one needs the drivers for the card that come from Matrox. Not being familiar with Fedora, I don't know if they provide all that is necessary within the distro itself. See whether you have mga_hal_drv.o installed. More than likely you'd find it in: /usr/X11R6/lib/modules/drivers (but that might vary on different distros). If you don't have it installed, you'll need to go to matrox.com and get the drivers.
Configuration of xorg.conf to provide dual monitors with the G400 is greatly eased by using an utility from Matrox called mgapdesk. Again, this might be provided within your distro. If not, then google around for a download somewhere appropriate to your distro or look for the source code for that utility and compileit on your system.
If you have no luck getting mgapdesk or don't wish to bother compiling it, you can manually edit xorg.conf to provide the functionality you seek (provided you have the drivers installed first). But this method, although certainly doable as I've done it a number of times on different distros, can be quite an effort and a pain in the ass.
If you want to see my XF86Config-4 file, I can post it here. It's configured for running dual monitor 19" CRTs running at 1024x768 each with the desktop spanned across the two of them using xinerama. But you'd still need to use that as a sample and get all the correct stuff plugged into it based on your system.