Xinerama Tri-Head configuration with 2 video cards (fglrx)

thepr0fess0r · 03-24-2009, 10:35 PM

Is this possible? I've read it is, but no matter how much I tweak my configuration, I can never get more than the displays from a single card to show. I've got 2 ports on each card (ATI Radeon 4850s) and I'm using 2 from one and 1 from the other.

I can get the desktop split across the 2, with the 3rd one blank, or display on just the one, with the other 2 blank, but never all 3 at once!

My Xorg.conf follows: Is there something I'm missing here?

-R

Code:

Section "ServerFlags"
	Option	    "AllowMouseOpenFail" "on"
#	Option	    "ZapWarning" "on"
	Option	    "Xinerama" "true"
EndSection

Section "ServerLayout"
	Identifier     "Layout[all]"
	Screen   "screen_right"
	Screen   "screen_center" RightOf "screen_right" 
	Screen   "screen_left" RightOf "screen_center"
	#Screen   "screen_center"
	#Screen   "screen_unused"

	#"screen_left" "screen_right" "screen_unused"
	#Screen      0  "screen_center"
	#Screen      1   "screen_left" LeftOf "screen_center"
	#Screen         "screen_right" RightOf "screen_center"
	InputDevice    "Keyboard[0]" "CoreKeyboard"
	InputDevice    "Mouse[1]" "CorePointer"
	#InputDevice    "Mouse[3]" "SendCoreEvents"
	Option	    "Clone" "off"
	Option "Xinerama" "on"
EndSection

Section "Device"
	Identifier  "card_0_0"
	Driver      "fglrx"
	BusID       "PCI:1:0:0"
	Screen	    0
EndSection

Section "Device"
	Identifier  "card_0_1"
	Driver      "fglrx"
	BusID       "PCI:1:0:0"
	Screen      1
EndSection

Section "Device"
	Identifier  "card_1_0"
	Driver      "fglrx"
	BusID       "PCI:4:0:0"
	Screen	    0
EndSection

Section "Device"
	Identifier  "card_1_1"
	Driver      "fglrx"
	BusID       "PCI:4:0:0"
	Screen      1
EndSection



Section "Monitor"
	Identifier   "monitor_left"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Monitor"
	Identifier   "monitor_right"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Monitor"
	Identifier   "monitor_center"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Monitor"
	Identifier   "monitor_unused"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection


Section "Screen"
	Identifier "screen_left"
	Device     "card_0_0"
	Monitor    "monitor_left"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Section "Screen"
	Identifier "screen_right"
	Device     "card_0_1"
	Monitor    "monitor_right"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Section "Screen"
	Identifier "screen_center"
	Device     "card_1_0"
	Monitor    "monitor_center"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Section "Screen"
	Identifier "screen_unused"
	Device     "card_1_1"
	Monitor    "monitor_unused"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection


Section "Module"
	Load  "glx"
	Load  "dbe"
	Load  "extmod"
	Load  "dri"
	Load  "freetype"
EndSection

Section "InputDevice"
	Identifier  "Keyboard[0]"
	Driver      "kbd"
	Option	    "Protocol" "Standard"
	Option	    "XkbLayout" "us"
	Option	    "XkbModel" "microsoftpro"
	Option	    "XkbRules" "xfree86"
EndSection

Section "InputDevice"
	Identifier  "Mouse[1]"
	Driver      "mouse"
	Option	    "Buttons" "7"
	Option	    "Device" "/dev/input/mice"
	Option	    "Name" "Cirque GlidePoint"
	Option	    "Protocol" "explorerps/2"
	Option	    "Vendor" "Sysp"
	Option	    "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
	Identifier  "Mouse[0]"
	Driver      "evdev"
	Option	    "HWHEELRelativeAxisButtons" "7 6"
	Option	    "InputFashion" "Mouse"
	Option	    "Name" "Logitech VX Nano Laser Mouse"
	Option	    "Pass" "3"
	Option	    "Vendor" "Sysp"
	Option	    "evBits" "+1-2"
	Option	    "keyBits" "~272-287"
	Option	    "relBits" "~0-2 ~6 ~8"
EndSection

Section "Modes"
	Identifier     "Modes[0]"
	ModeLine     "1680x1050" 146.0 1680 1784 1960 2240 1050 1053 1059 1089
EndSection

Section "DRI"
	Group        "video"
	Mode         0660
EndSection

Section "Extensions"
Option "Composite" "Enable"
Option "RENDER" "Enable"
EndSection

thepr0fess0r · 03-25-2009, 06:33 AM

(The effect of the above configuration is that the left and right monitors are configured properly, and the center one isn't active. If I list the center one first in the ServerLayout, it shows up properly, but the left and right screens don't.)