Problems with SGI 1600SW resolution

[Cory Simpson <csimpson@xxxxxxxxxx>]

Hello, I have been having some problems setting up my SGI 1600SW to 
display correctly with XFree86 4.3. Here is my setup.

XFree86-4.3
ATI Radion 7500 (Using DVI)
SGI 1600SW (via multilink adapter)

I located the correct modeline here for my monitor:

http://www.xfree86.org/4.3.0/I1284.html#4

But for some reason the Multilink adapter reports that it is running at 
1280x1024 even though in the log it says that X is running at 1600x1024. 
I found a few folks with similar problems but none that helped me figure 
out the problem.

http://marc.theaimsgroup.com/?l=xfree86&m=104947172314323&w=2
http://www.fedoraforum.org/forum/showthread.php?t=20844&goto=nextoldest

Is this a problem with 4.3 and radeons? Maybe I can fix it by upgrading 
to 4.4? If anyone has any suggestions please let me know. I attached a 
copy of my XF86Config for reference.

C




Section "ServerLayout"
	Identifier     "Default Layout"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
	InputDevice    "DevInputMice" "AlwaysCore"
EndSection

Section "Files"
	RgbPath      "/usr/X11R6/lib/X11/rgb"
	FontPath     "unix/:7100"
EndSection

Section "Module"
        Load    "ddc"
        Load    "GLcore"
	Load	"fbdevhw"
        Load    "dbe"
        Load    "dri"
        Load    "extmod"
        Load    "glx"
        # Load  "record"
        Load    "bitmap"
        Load    "freetype"
        # Load  "speedo"
        Load    "type1"
        Load    "vbe"
        Load    "int10"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "keyboard"
	Option	    "XkbRules" "xfree86"
	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" "false"
EndSection

Section "InputDevice"

# If the normal CorePointer mouse is not a USB mouse then
# this input device can be used in AlwaysCore mode to let you
# also use USB mice at the same time.
	Identifier  "DevInputMice"
	Driver      "mouse"
	Option	    "Protocol" "IMPS/2"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5"
	Option	    "Emulate3Buttons" "no"
EndSection

Section "Monitor"
	Identifier 	"SGI 1600SW"
	VendorName	"SGI"
	ModelName	"1600SW"
        Modeline 	"1600x1024g" 108.0 1600 1616 1656 1704 1024 1027 1030 1056 -Hsync -Vsync
        Option          "OverridePolarity" "1"
        HorizSync	31.0 - 64.0
        VertRefresh	60.0
        Option		"dpms" 
EndSection

Section "Device"
	Identifier  "Radeon 7500"
	Driver      "radeon"
	VendorName  "Videocard vendor"
	BoardName   "ATI Radeon 7500"
	VideoRam    65536
	#Option      "AGPMode" "4"
	#Option      "AGPFastWrite" "on"
	#Option      "BusType" "AGP"
	#Option      "DDCMode" "on"
	#Option      "MonitorLayout" "TMDS"
        #Option      "PanelSize" "1600x1024"
        #Option      "EnablePageFlip" "on"
        
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Radeon 7500"
	Monitor    "SGI 1600SW"
	DefaultDepth     24
	SubSection "Display"
		Depth     24
		Modes    "1600x1024g"
	EndSubSection
EndSection

Section "DRI"
	Group        0
	Mode         0666
EndSection