[Xorg] Xinerama problem with a Matrox G450 and a Radeon 9200SE

Andrew Clayton andrew at digital-domain.net
Thu Jul 22 10:24:16 PDT 2004


I've been running an AGP Matrox G450 with two monitors in xinerama mode
for a couple of years.

In preparation to adding a third monitor to the xinerama mix, I added a
PCI Radeon 9200SE.

Before adding the third monitor I tried using xinerama across the two
cards (1 monitor connected to both cards). It's proving to be quite
tricky... but I think I'm close.

Eventually I would like to two end up with two monitors on the G450 and
one monitor on the 9200SE.

The current problem I'm having is that, when the G450 monitor is set as
screen 0 and the 9200SE monitor is set as Screen 1 in xorg.conf
(attached), the G450 one comes up but not the 9200SE and xinerama seems
to have been disabled. If I change the Screen 1 and 0 around in
xorg.conf, the 9200SE comes up but not the G450.

I've attached an xorg.conf and corresponding Xorg.0.log where the 9200SE
doesn't come up. It says that Screen 1 was deleted because there was no
config found, but I can't see whats missing.

As I said earlier, I've had the G450 running in xinerama ok. The 9200SE
does work in standalone mode. I can also run an X server on the G450 and
another X server on the 9200SE, just can't quite get them to work
together under xinerama.

This is under FC2.

Hopefully a fresh pair of eyes will see something....

Any help is much appreciated.


Andrew Clayton

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# XFree86 4.0 configuration generated by Xconfigurator

Section "ServerLayout"
	Identifier "XFree86 Configured"
	Screen      0  "Screen0" 0 0
 	Screen         "Screen 1" RightOf "Screen 0"
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"

# By default, Red Hat Linux 6.0 and later use xfs

Section "Files"
	FontPath "unix/:7100"

# Module loading section

Section "Module"
	Load  "dbe"		# Double-buffering
	Load  "GLcore"		# OpenGL support
	# Load  "dri"		# Direct rendering infrastructure
	Load  "glx"		# OpenGL X protocol interface
	Load  "extmod"		# Misc. required extensions
	# Load  "v4l"		# Video4Linux
	Load  "record"	# X event recorder
	# You only need the following two modules if you do not use xfs.
	Load  "freetype"	 # TrueType font handler
	Load  "type1"		# Adobe Type 1 font handler

Section "ServerFlags"
        Option "Xinerama"

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "keyboard"
	Option      "XkbLayout"	"gb"

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

Section "Monitor"
	Identifier "HM703U"
	VendorName "Unknown"
	ModelName  "Unknown"
	HorizSync 30 - 96
	VertRefresh 50 - 160
	Option "dpms"

Section "Monitor"
        Identifier "Iiyama A701GT, VisionMasterPro 400"
        VendorName "Unknown"
        ModelName  "Unknown"
        HorizSync 27.0-96.0
        VertRefresh 50.0-160.0
        Option "dpms"

Section "Device"
	Identifier  "G450"
        Driver      "mga"
        BusID       "PCI:1:0:0"
	Option      "AGPMode" "2"
	Screen	0

#Section "Device"
#        Identifier  "G450-1"
#        Driver      "mga"
#	BusID       "PCI:1:0:0"
#	Option      "AGPMode" "2"
#	Screen	1

Section "Device"
	Identifier	"9200SE"
	Driver		"radeon"
	Screen	1

Section "Screen"
	Identifier "Screen 0"
	Device "G450"
	Monitor "HM703U"
	DefaultDepth 16
	Subsection "Display"
		Depth 16
		Modes "1152x864" "1024x768" "800x600" "640x480"

Section "Screen"
       Identifier "Screen 1"
        Device     "9200SE"
        Monitor    "Iiyama A701GT, VisionMasterPro 400"
        DefaultDepth     16
        SubSection "Display"
                Depth     16
                Modes    "1152x864" "1024x768" "800x600" "640x480"

#Section "DRI"
#	Mode 0666
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