Default monitor change in dual monitor.

sktjcc · 05-28-2006, 12:39 AM

How can I change default monitor in dual monitors?

I installed Fedora Core5.

And I am using Geforce 6600 graphic card which have one DVI port and one SVGA port. I have two Samsung SyncMaster LCD monitors. I connected one LCD to DVI and the other to SVGA port.

I managed to configure xorg.conf file to support TwinView.
However, in any configuration I've tried, the default monitor is always the one connected to SVGA port.

I'd like to set the monitor connected to DVI port as default monitor.

slackmagic · 05-28-2006, 01:18 AM

hi there sktjcc,

first of all welcome to LQ.org

Now to your issue: if you take a look at your /etc/X11/xorg.conf

Code:

Section "Device"
 ...
Option     "TwinView"
Option "ConnectedMonitor" "CRT,CRT"
 ...
End Section

You may see a section that looks like that or maybe not, but it's quite essential as it sets the order of your display devices. In this example it's 2 CRT monitors (or you could also say one that's connected to your VGA and the other is your LCD in analog mode (non-dvi cable)

important: if you use your LCD in analog mode (non-dvi cable or with the adapter DVI-to-VGA) you should refer to the monitor as "CRT"

Now in your case it should be

Code:

Section "Device"
 ...
Option     "TwinView"
 ...
Option "ConnectedMonitor" "DFP,CRT"
 ...
End Section

DFP = digital flat panel which also means LCD through DVI cable

this will set your LCD as the primary monitor display device and the CRT monitor as second

Code:

Option "ConnectedMonitor" "CRT,DFP"

of course would reverse that (CRT=1) and DFP/LCD=2

Hope this helps!

sktjcc · 05-28-2006, 07:34 AM

Thank you very much for your reply.

But it's not working.

It is my xorg.conf file. Can you please check it?
==============================================================================
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder3) Wed Mar 29 14:43:26 PST 2006

# Xorg configuration created by system-config-display

Section "ServerLayout"
Identifier "Multihead layout"
Screen 0 "Screen0" RightOf "Screen1"
Screen 1 "Screen1" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
Option "Xinerama" "off"
Option "Clone" "on"
EndSection

Section "Files"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, a font server independent of the X server is
# used to render fonts.
FontPath "unix/:7100"
EndSection

Section "Module"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "glx"
Load "record"
Load "freetype"
Load "type1"
EndSection

Section "InputDevice"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds" "1 2 3"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
# Option "XkbDisable"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults). For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:swapcaps"
# Or if you just want both to be control, use:
# Option "XkbOptions" "ctrl:nocaps"
#
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"
EndSection

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Samsung SyncMaster 172T/176T/CX176T/CX171T (Digital)"
DisplaySize 340 270
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Samsung SyncMaster 172T/176T/CX176T/CX171T (Digital)"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "Videocard Vendor"
BoardName "nVidia Corporation NV43 [GeForce 6600]"
Option "TwinView"
Option "MetaModes" "1280x1024,1280x1024; 1280x1024; 1024x768,1024x768; 1024x768; 800x600,800x600; 800x600"
Option "TwinViewOrientation" "RightOf"
Option "ConnectedMonitor" "DFP,CRT"
BusID "PCI:4:0:0"
EndSection

#Section "Device"
# Identifier "Videocard1"
# Driver "nvidia"
# VendorName "Videocard vendor"
# BoardName "nVidia Corporation NV43 [GeForce 6600]"
# Option "TwinView"
# Option "MetaModes" "1280x1024,1280x1024; 1280x1024; 1024x768,1024x768; 1024x768; 800x600,800x600; 800x600"
#EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 16
SubSection "Display"
#Viewport 0 0
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard0"
Monitor "Monitor1"
DefaultDepth 16
SubSection "Display"
#Viewport 0 0
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection