I’m using RHEL 7 and I’m having an issue generating xorg.conf from the command line. Its close but not quite there. The issue is it appears that I have to have the ModelName of the monitor in the Monitor section in order for the screen layout to work properly. Monitors are positioned one above the other. If this were just one or two systems, it would be no big deal to use nvidia-settings to layout the screens, but this is many systems across an enterprise.
While I could issue an xrandr command using a custom systemd service definition file, each system runs a secondary Xorg display which depends on a copy of xorg.conf for its screen layout. Adjusting the screen layout using xrandr on this secondary display does not always appear to work.
Additionally there is no guarantee the monitor will be the same on every system. This prevents generating a custom xorg.conf and using it everywhere. The only guarantee I have is the top screen will be attached to DVI-I-1.
xorg.conf generated by nvidia-setting:
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 352.55 (buildmeister@swio-display-x64-rhel04-15) Thu Oct 8 15:51:28 PDT 2015
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
FontPath "/usr/share/fonts/default/Type1"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "NEC LCD2490WUXi2"
HorizSync 31.0 - 92.0
VertRefresh 50.0 - 85.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro K5200"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "DP-1: nvidia-auto-select +0+1200, DVI-I-1: nvidia-auto-select +0+0"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Here is the command I used to generate xorg.conf from nvidia-xconfig:
nvidia-xconfig -a --metamodes=“DP-1: nvidia-auto-select +0+1200, DVI-I-1: nvidia-auto-select +0+0” --sli=off --stereo=0 --multigpu=off --nvidia-xinerama-info-order=DFP-2
xorg.conf generated by above command:
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 352.55 (buildmeister@swio-display-x64-rhel04-15) Thu Oct 8 15:52:34 PDT 2015
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
FontPath "/usr/share/fonts/default/Type1"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro K5200"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "MultiGPU" "off"
Option "SLI" "off"
Option "MetaModes" "DP-1: nvidia-auto-select +0+1200, DVI-I-1: nvidia-auto-select +0+0"
Option "nvidiaXineramaInfoOrder" "DFP-2 DVI-I-1"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Immediatly the items I find in a diff are as follows:
In ServerLayout section: Missing " 0 0" on the screen line.
In Monitor section: missing the Modelname, HorizSync and VertRefresh are wrong.
In Screen section: “BaseMosaic” “off” is missing all together
Any help in fixing my command would be greatly appreciated.