Re: Dual head howto?

[Simon Hepburn <sth@blueyonder.co.uk>]

Here are the important bits. *do not * use this, modify it. The bus id for 
your card may well be different. Remember you cannot use Xinerama and 3d 
accel together, choose one or the other. 

# XF86Config-4 

#Uncomment for Xinerama
#Section "ServerFlags"
#	Option		"Xinerama"	"yes"
#EndSection

Section "InputDevice"
	Identifier	"Keyboard_0"
	Driver		"keyboard"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xfree86"
	Option		"XkbModel"	"pc102"
	Option		"XkbLayout"	"gb"
EndSection

Section "InputDevice"
	Identifier	"Mouse_0"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"IMPS/2"
	Option		"ZAxisMapping"		"4 5"
EndSection


Section "Device"
	Identifier  "Card_0"
	Driver      "mga"
	VendorName  "Matrox"
	BoardName   "MGA G400 AGP"
	BusID       "PCI:1:5:0"
	Screen      0 		
EndSection


Section "Device"
	Identifier  "Card_1"
	Driver      "mga"
	VendorName  "Matrox"
	BoardName   "MGA G400 AGP"
	BusID       "PCI:1:5:0"
	Screen      1	
EndSection

Section "Monitor"
	Identifier	"Monitor_0"
	VendorName	"Sony"
	ModelName	"CPD-17F23"
	HorizSync	31.5-64
	VertRefresh	50-120
EndSection

Section "Monitor"
	Identifier	"Monitor_1"
	VendorName	"Packard-Bell"
	ModelName	"PB8539VG"
	HorizSync	31.5
	VertRefresh	60-70
EndSection

Section "Screen"
	Identifier	"Screen_0"
	Device		"Card_0"
	Monitor		"Monitor_0"
	DefaultDepth	16
	SubSection "Display"
		Depth		16
		Modes		"1024x768"
	EndSubSection
EndSection

Section "Screen"
	Identifier	"Screen_1"
	Device		"Card_1"
	Monitor		"Monitor_1"
	DefaultDepth	16
	SubSection "Display"
		Depth		16
		Modes		"640x480"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Screen_0" 
	Screen		"Screen_1" RightOf "Screen_0" 
	InputDevice	"Keyboard_0"
	InputDevice	"Mouse_0"
EndSection


# end of XF86Config




Paul Mackinney wrote:

> Hi,
>
> I have a 16 MB dual-head Matrox G400 and a spare 15" monitor, currently
> running X at 1152x864 w/24 bit depth on my main 17" display. I'm having
> trouble finding documentation for configuring the second head.
>
> I'm running Blackbox on Debian GNU/Linux with a custom kernel to support
> the Matrox frame buffer, XFree86 Version 4.1.0.1 / X Window System. The
> XF86Config-4 man page has some good examples for setting up multiple
> "Monitor" and "Screen" sections, but I'm confused about how to tell it
> to put the 17" Monitor on the primary head and the 15" Monitor on the
> second head.
>
> Pointers to the right docs and/or specific configuration examples
> appreciated. Here's the output from dmesg, which seems to indicate that
> the second screen buffer is being allocated.
>
> matroxfb: Matrox G400 (AGP) detected
> matroxfb: MTRR's turned on
> matroxfb: 1024x768x8bpp (virtual: 1024x16380)
> matroxfb: framebuffer at 0xD8000000, mapped to 0xce81f000, size 16777216
> Console: switching to colour frame buffer device 128x48
> fb0: MATROX VGA frame buffer device
> .
> .
> .
> i2c-core.o: adapter DDC:fb0 #0 on i2c-matroxfb registered as adapter 0.
> i2c-core.o: adapter DDC:fb0 #1 on i2c-matroxfb registered as adapter 1.
> i2c-core.o: adapter MAVEN:fb0 on i2c-matroxfb registered as adapter 2.
> i2c-core.o: driver maven registered.
> i2c-core.o: client [maven client] registered to adapter [MAVEN:fb0 on
> i2c-matrox
> fb](pos. 0).
> matroxfb_crtc2: secondary head of fb0 was registered as fb1
>
> TIA,
>
> Paul

-- 
Simon Hepburn.