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External display setup with different screen resolutions



Hi,

I know this has been asked over a thousand times before, but I can't get
an external display to work properly. I'm running an IBM T41p with
Sarge, kernel 2.6.10, XFree 4.3.0 and fglrx 8.14.13.1.

Problem is: The LCD panel has a resolution of 1400x1050, the external
TFT has only 1024x768. I have managed to get the external display
showing something, but with the LCD panel's resolution which enables
scrolling.

The more I look for information on the web, the more options I discover
I have not heard of before... I'm getting confused and don't know what
else to look for.

I'd appreciate any help!

The relevant stuff in XFreeConfig-4 looks as follows:

Section "Device"
	Identifier	"Card0"
	Driver		"fglrx"
	Option "VideoOverlay" "on"
	Option "OpenGLOverlay" "off"
	Option "UseInternalAGPGART" "no"

	# Found this option via Google on
	# https://lg3d-core.dev.java.net/etc/XF86Config-4.talin-single
	# Should enabled clone mode
	Option "DesktopSetup"	"0x00000100"
EndSection

Section "Device"
	Identifier	"Card1"
	Driver		"fglrx"

	# Found this on
http://f24.parsimony.net/cgi-bin/topic-flat.cgi?Nummer=54930&Phase=Phase1&ThreadNummer=63772
	# Supposed to force resolution on external display, but doesn't
	Option		"MonitorLayout" "AUTO, CRT"
	Option		"CloneMode" "1024x768"
EndSection

Section "Monitor"
	Identifier	"MonInt"
	HorizSync	28-50
	VertRefresh	43-75
	Option		"DPMS"
EndSection

Section "Monitor"
	Identifier	"MonExt"
	ModelName	"Standard SVGA 1024x768@60Hz"
	HorizSync	30-60
	VertRefresh	43-90
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"ScreenInt"
	Device		"Card0"
	Monitor		"MonInt"
	DefaultDepth	24
	
	# [ skipped a few SubSections here ]

	SubSection "Display"
		Depth		24
		Modes		"1400x1050" "1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "Screen"
	Identifier	"ScreenExt"
	Device		"Card1"
	Monitor		"MonExt"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"1024x768" "800x600" "640x480"
		ViewPort	0 0
	EndSubSection
EndSection

Thanks,
André



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