Hi, I hope someone can help me out. I am having trouble setting up 4 monitors in Centos5. I have searched some threads and have tried some of the solutions but I must be missing something in my xorg.conf file.

I have two DualHead video cards installed. At the moment the system is running fine on 2 monitors and I am spanning the desktop over the 2 monitors. The other 2 monitors on the other video card are not displaying anything. My goal is to span the desktop over all 4 monitors.

The monitors are laid out 2x2 or 2 over 2.


Here is my xorg.conf file...



# Xorg configuration created by system-config-display

Section "ServerLayout"
Identifier "Multihead layout"
Screen 0 "Screen0" LeftOf "Screen1"
Screen 1 "Screen1" 0 0
Screen 2 "Screen2" 0 0
Screen 3 "Screen3" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
Option "Xinerama" "on"
Option "Clone" "off"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Monitor"
Identifier "Monitor0"
ModelName "DELL E207WFP"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "DELL E207WFP"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor2"
VendorName "Monitor Vendor"
ModelName "DELL E207WFP"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor3"
VendorName "Monitor Vendor"
ModelName "DELL E207WFP"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 75.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
VendorName "Videocard Vendor"
BoardName "ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]"
BusID "PCI:12:6:0"
Screen 0
EndSection

Section "Device"
Identifier "Videocard1"
Driver "radeon"
VendorName "Videocard Vendor"
BoardName "ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]"
BusID "PCI:12:6:0"
Screen 1
EndSection

Section "Device"
Identifier "Videocard2"
Driver "radeon"
VendorName "Videocard Vendor"
BoardName "ATI Technologies Inc Rage XL"
BusID "PCI:13:4:0"
Screen 2
EndSection

Section "Device"
Identifier "Videocard3"
Driver "radeon"
VendorName "Videocard Vendor"
BoardName "ATI Technologies Inc Rage XL"
BusID "PCI:13:4:0"
Screen 3
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1680x1050"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1680x1050"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen2"
Device "Videocard2"
Monitor "Monitor2"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1680x1050"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen3"
Device "Videocard3"
Monitor "Monitor3"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1680x1050"
EndSubSection
EndSection




And here is the ouptput of the command lspci:


0c:06.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
0d:04.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)

.

Unfortunately, I have no idea how, but a word of encouragement...

My school has a 15-monitor setup going on CentOS. Apparently cost $10,000 of our tuition fees to get it, and it's done nothing useful.

wait how is the 15 monitor thing setup? 3x5 3 down 5 across??? talk about wide screen damn!!


sorry i have no clue how to do that man im just amazed on the 15 monitors....

Yeah, 5 across, 3 down. it was fun watching it boot into CentOS one day, and they've since added a pair of somewhat-live cameras (A few seconds, about 30-60, or delay), but it often freezes.

I finally got my 4 monitors working. If anyone is interested you can hit this link:

http://www.linuxquestions.org/questi...entos5-584295/