Sucess with dual monitors

[Jean Hollis Weber]

phenix777 wrote:
> What I am trying to do is get a multiple monitor setup to work.  It's a
> desktop computer with an ATI Radeon 9600  (dual head) graphics card. 
> Both monitors work just fine in windows; but I can't figure out how to
> configure this in Ubuntu.
> 
> Could anyone please tell me the changes I need to make to my xorg.conf
> file...

I just went through this a few days ago, with a lot of help from
this list, so I hope I can help you a bit. I will attach at the
end of this note my xorg.conf file, which may give you some clues.

Be sure to make a backup copy of your file before you start
editing it. Are you new to working on a Linux command line? I
was, so I needed a lot of instruction on what to do.

If you wish, I will also post a set of instructions for making
the changes, stopping and restarting x, and recovering if you
manage to crash x completely, as I did on several occasions.
Daniel Carrera (someone you will see on this list if you stay
around for awhile) wrote these instructions for me, and they have
saved my life and sanity several times!

The main things you need in your xorg.conf file that you do not
have are TWO "Device" sections, TWO "Monitor" sections, and TWO
"Screen" sections, one for each of the monitors you want to use.
Then the "ServerLayout" section needs to include both monitors.
See my xorg.conf file for an example.

You will also need to install xinerama.

Here is my xorg.conf file. I hope it helps.

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
	FontPath	"/usr/share/X11/fonts/misc"
	FontPath	"/usr/share/X11/fonts/cyrillic"
	FontPath	"/usr/share/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/share/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/share/X11/fonts/Type1"
	FontPath	"/usr/share/X11/fonts/CID"
	FontPath	"/usr/share/X11/fonts/100dpi"
	FontPath	"/usr/share/X11/fonts/75dpi"
         # paths to defoma fonts
	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"
EndSection

Section "Module"
	Load	"GLcore"
	Load	"i2c"
	Load	"bitmap"
	Load	"ddc"
	Load	"dri"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"type1"
	Load	"vbe"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection

Section "InputDevice"
	Identifier	"Synaptics Touchpad"
	Driver		"synaptics"
	Option		"SendCoreEvents"	"true"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"auto-dev"
	Option		"HorizScrollDelta"	"0"
EndSection

Section "Device"
	Identifier	"Intel Corporation 82852/855GM Integrated Graphics
Device"
	Driver		"i810"
	BusID		"PCI:0:2:0"
	Screen		0
	Option 		"MonitorLayout" "CRT,LFP"
EndSection

Section "Device"
	Identifier	"Device1"
	Driver		"i810"
	BusID		"PCI:0:2:0"
	Screen		1
	Option 		"MonitorLayout" "CRT,LFP"
#	Option		"CRT2Position" "LeftOf"
EndSection

Section "Monitor"
	Identifier	"Laptop Monitor"
	Option		"DPMS"
EndSection

Section "Monitor"
	Identifier	"External Monitor Acer"
	Option		"DPMS"
#	HorizSync       30-70
#	VertRefresh     50-160
EndSection

Section "Screen"
	Identifier	"Laptop Screen"
	Device		"Intel Corporation 82852/855GM Integrated Graphics Device"
	Monitor		"Laptop Monitor"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1400x1050"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1400x1050"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1400x1050"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1400x1050"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1400x1050"
	EndSubSection
EndSection

Section "Screen"
	Identifier	"Secondary Screen"
	Device		"Device1"
	Monitor		"External Monitor Acer"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1280x1024"
	EndSubSection
EndSection

#Section "ServerLayout"
#	Identifier	"Default Layout"
#	Screen		"Laptop Screen"
#	InputDevice	"Generic Keyboard"
#	InputDevice	"Configured Mouse"
#	InputDevice	"Synaptics Touchpad"
#EndSection

Section "ServerLayout"
	Identifier	"Dual-monitor Layout"
	Screen		0  "Laptop Screen"	0	0
	Screen		1  "Secondary Screen"	LeftOf	"Laptop Screen"
#	Option		"Clone" "On"
	Option		"Xinerama" "On"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	InputDevice	"Synaptics Touchpad"
EndSection

Section "DRI"
	Mode	0666
EndSection