Rayven
2nd August 2006, 15:21
I am not sure if this belongs in the Qt forums or the OpenGL forums, but I thought I would try anyhow. I am using a QGLWidget on an HP workstation that has 4 monitors. There are, however, only 2 video cards with one digital output each. The output is split into 2 connectors using a video splitter cable. I am running Linux Red Hat WS and the xorg.conf file is setup to span 2 desktops across 2 monitors.
The Problem:
The issue I am having is that any OpenGL widget will only appear on monitor 0. Monitors 1 - 3 do not display anything. Anything built using Qt (minus the QGLWidget) appear correctly. I am really not sure how to solve this problem, and the monitor/computer setup cannot change easily (meaning, somone other than me has to make the modification decision). Is there anything I can do in Qt to fix the problem? Or do I need to suggest a different setup for the machine?
Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" Rightof "Screen0"
Screen 2 "Screen2" Rightof "Screen1"
Screen 3 "Screen3" Rightof "Screen2"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "ServerFlags"
Option "Xinerama" "1"
EndSection
: // Left out InputDevice sections
Section "Monitor"
Identifier "Monitor0"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Monitor"
Identifier "Monitor2"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Monitor"
Identifier "Monitor3"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Device:
Identifier "Videocard0"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:1:0:0"
Screen 0
EndSection
Section "Device:
Identifier "Videocard1"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Device:
Identifier "Videocard2"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:16:0:0"
Screen 0
EndSection
Section "Device:
Identifier "Videocard3"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:16:0:0"
Screen 1
EndSection
Section "Screen"
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" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen2"
Device "Videocard2"
Monitor "Monitor2"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen3"
Device "Videocard3"
Monitor "Monitor3"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
If there are any "spelling" mistakes in the xorg.conf file, please disregard them. I had to type the file in manually. Thanks for any suggestions!
The Problem:
The issue I am having is that any OpenGL widget will only appear on monitor 0. Monitors 1 - 3 do not display anything. Anything built using Qt (minus the QGLWidget) appear correctly. I am really not sure how to solve this problem, and the monitor/computer setup cannot change easily (meaning, somone other than me has to make the modification decision). Is there anything I can do in Qt to fix the problem? Or do I need to suggest a different setup for the machine?
Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" Rightof "Screen0"
Screen 2 "Screen2" Rightof "Screen1"
Screen 3 "Screen3" Rightof "Screen2"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "ServerFlags"
Option "Xinerama" "1"
EndSection
: // Left out InputDevice sections
Section "Monitor"
Identifier "Monitor0"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Monitor"
Identifier "Monitor2"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Monitor"
Identifier "Monitor3"
VendorName "HP"
ModelName "HP 1825 Flat Panel Monitor"
DisplaySize 360 290
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "dpms"
EndSection
Section "Device:
Identifier "Videocard0"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:1:0:0"
Screen 0
EndSection
Section "Device:
Identifier "Videocard1"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Device:
Identifier "Videocard2"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:16:0:0"
Screen 0
EndSection
Section "Device:
Identifier "Videocard3"
Driver "nvidia"
VendorName "Nvidia"
BoardName "Nvidia Quadro 4 (generic)"
Option "TwinView" "True"
Option "TwinViewOrientation" "RightOf"
Option "UseEdidFreqs" "True"
Option "MetaModes" "1024x768, 1024x768"
BusID "PCI:16:0:0"
Screen 1
EndSection
Section "Screen"
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" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen2"
Device "Videocard2"
Monitor "Monitor2"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen3"
Device "Videocard3"
Monitor "Monitor3"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
If there are any "spelling" mistakes in the xorg.conf file, please disregard them. I had to type the file in manually. Thanks for any suggestions!