Fedora 9: Nvidia dual head support

[Schwups]

Hello everybody,

I was trying to set up dual head support for Fedora 9, but after browsing through some threads and articles I have the feeling to be stuck somehow, so probably you can help me.

I have a GeForce 7600 GT with two DVI connectors. When trying to set up Gnome to use both of them, I go to System --> Administration --> Display and there I choose "Dual head". Unfortunately I cannot choose a second video card (the drop down box is empty), so I guess this is my problem.

I have installed the Nvidia video drivers as described here. In the Display settings, under hardware, the driver "nvidia - Vendor-supplied driver for nvidia cards" is selected.

This is my /etc/X11/xorg.conf file, which I think looks good:

# Xorg configuration created by livna-config-display

Section "ServerLayout"
	Identifier     "Default Layout"
	Screen      0  "Screen0" 0 0
	Screen      1  "Screen1" 0 0
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
	ModulePath   "/usr/lib/xorg/modules/extensions/nvidia"
	ModulePath   "/usr/lib/xorg/modules"
EndSection

Section "ServerFlags"
	Option	    "AIGLX" "on"
EndSection

Section "InputDevice"

# keyboard added by rhpxl
	Identifier  "Keyboard0"
	Driver      "kbd"
	Option	    "XkbModel" "pc105"
	Option	    "XkbLayout" "de"
	Option	    "XkbVariant" "nodeadkeys"
EndSection

Section "Device"
	Identifier  "Videocard0"
	Driver      "nvidia"
	Option	    "AddARGBGLXVisuals" "True"
EndSection

Section "Device"
	Identifier  "Videocard1"
	Driver      "nvidia"
	Option	    "AddARGBGLXVisuals" "True"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Videocard0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Section "Screen"
	Identifier "Screen1"
	Device     "Videocard1"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Section "Extensions"
	Option	    "Composite" "Enable"
EndSection

So I don't have a clue why the second monitor isn't working under X. Before I have installed the nvidia driver, I got strange colours, after installing them the monitor is not getting a signal any more.

Thanks for any help in advance,
Schwups

[kglidh]

I had the same issue although I use ATI (or Radeon). FC9 uses a new method for dual screen and I like it much better. At the prompt issue the xrandr command:

[root@lidhfc9 ~]# xrandr
Screen 0: minimum 320 x 200, current 3360 x 1050, maximum 3360 x 1050
VGA-0 disconnected 1680x1050+1680+0 (normal left inverted right x axis y axis) 0mm x 0mm
1680x1050_60.00 60.0*
LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 365mm x 228mm
1680x1050 58.8*+
S-video disconnected (normal left inverted right x axis y axis)

In your xorg.conf, you only define one screen

Section "InputDevice"
# keyboard added by rhpxl
Identifier "Generic Keyboard"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Monitor"
Identifier "VGA-0"
Option "Enable" "true"
Option "DPMS"
EndSection

Section "Monitor"
Identifier "Integrated LCD"
Option "RightOf" "VGA-0"
Option "DPMS"
EndSection

Section "Device"
Identifier "ATI Technologies Inc Radeon XPRESS 200M"
Driver "radeon"
BusID "PCI:1:05:0"
Option "Monitor-LVDS" "Integrated LCD"
EndSection

Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies Inc Radeon XPRESS 200M"
DefaultDepth 24
SubSection "Display"
Depth 24
Virtual 3360 1050
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
EndSection

This post helped me a ton. http://wiki.debian.org/XStrikeForce/HowToRandR12

[webaware]

See NVIDIA's documentation on setting up Twinview, or alternatively setting up multiple X-screens.