Dual Monitor / Spanning Desktop Problems

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seaserpent76
Posts: 2
Joined: 2005/08/19 21:15:48

Dual Monitor / Spanning Desktop Problems

Post by seaserpent76 » 2005/08/19 21:37:56

I'm having trouble getting a dual Monitor setup to work. i've run the GUI utility for /usr/bin/system-config-display
I have 2 same Dell 770s that CentOS seemed to autodetect. It also found both video cards.
In the utility [Display Settings] , under the tab [Dual Head] I've checked "Use Dual Head", verified the 2nd video Card is correct, Resolution and Color Depth are the same as the main monitor [1280x960 / Millions of Colors] Desktop Layout is "Spanning Desktops"
When I click OK i get a message saying the changes where saved and you have to restart the X server.
I reboot the machine and still nothing. Have done this several times. Any suggestions?

seaserpent76
Posts: 2
Joined: 2005/08/19 21:15:48

Still Having Dual Monitor / Spanning Desktop Problems

Post by seaserpent76 » 2005/08/26 16:29:26

Here is the /etc/X11/xorg.comf file for the above listed configureation. I have run the same setup on this machine with Windows XP Pro & ensured the hardware is functioning, all cables attached properly, etc.... Any reccomendations would be helpfull.

# Xorg configuration created by system-config-display

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

Section "Files"

# RgbPath is the location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.
# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.
RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "unix/:7100"
EndSection

Section "Module"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "glx"
Load "record"
Load "freetype"
Load "type1"
Load "dri"
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"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Dell E770s"
DisplaySize 320 240
HorizSync 30.0 - 70.0
VertRefresh 50.0 - 160.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Dell E770s"
HorizSync 30.0 - 70.0
VertRefresh 50.0 - 160.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
VendorName "Videocard vendor"
BoardName "ATI Radeon 9200SE"
EndSection

Section "Device"
Identifier "Videocard1"
Driver "i810"
VendorName "Videocard Vendor"
BoardName "Intel 865"
BusID "PCI:0:2:0"
Screen 1
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 16
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x960"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection

mikeCentOS
Posts: 3
Joined: 2005/11/13 19:11:22
Contact:

Re: Dual Monitor / Spanning Desktop Problems

Post by mikeCentOS » 2005/11/28 02:04:20

I managed to get this to work. Here's the specs on my machine:

AGP slot, GeForce4 Ti-4200 with 128MB RAM, connected to a NEC Multisync P1150
PCI slot, Voodoo3 with 16MB RAM, connected to a KDS VS-19s

Note what I have commented out. I don't know why this works. I had a functioning config on
another PC long ago and kept the config file. Made my CentOS 4.2 xorg.conf look more like
the old file I have saved and it seems to work. This gives TWO separate desktops, not a
span. I think you'll need to turn on Xinerama to get a span.

Here's my xorg.conf:

[root@daddy X11]# cat xorg.conf
# Xorg configuration created by system-config-display

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

Section "Files"

# RgbPath is the location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.
# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.
RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "unix/:7100"
EndSection

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

##VendorName "Monitor Vendor"
Identifier "Monitor0"
ModelName "NEC MultiSync P1150"
HorizSync 31.0 - 94.0
VertRefresh 55.0 - 160.0
Option "dpms"
EndSection

Section "Monitor"

##VendorName "Monitor Vendor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "KDS Visual Sensations VS-195"
HorizSync 30.0 - 95.0
VertRefresh 50.0 - 120.0
Option "dpms"
EndSection

Section "Device"

##VendorName "Videocard vendor"
Identifier "Videocard0"
Driver "nv"
BoardName "NVIDIA GeForce 4 (generic)"
EndSection

Section "Device"

##VendorName "Videocard Vendor"
##Screen 1
Identifier "Videocard1"
Driver "tdfx"
VendorName "Videocard Vendor"
BoardName "Voodoo3 (generic)"
VideoRam 16384
BusID "PCI:0:11:0"
EndSection

Section "Screen"

##SubSection "Display"
## Viewport 0 0
## Depth 16
## Modes "800x600" "640x480"
##EndSubSection
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"

##Viewport 0 0
Depth 24
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"

##Viewport 0 0
Depth 24
Modes "1280x1024" "1024x768"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection

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