HowtoSetupExternalMonitorForIntel915
Hi all, I would like to describe how you can make your external monitor to work in Ubuntu Dapper Drake, if you have an intel 915 graphic card (which is mostly used in laptops). My desired Resolution is 1280x800 with 60Hz for my LCD of laptop and 1024x768 with 85Hz for my CRT external monitor.
There are two solutions for working with external monitors:
- The external monitor become exactly mirror of LCD (I use "Clone Heads" for this)
- The external monitor has another screen so that we can switch between screen of LCD and screen of external monitor(I use "Separate Heads" for this)
It will be great, If there is a choice for the user to select witch solution he wants in run time. Fortunately, having multiple "ServerLayout" section in xorg.conf file and defining multiple "server" in gdm.conf file provides this flexibility.
The only trick is if you want to stay in 85Hz in Clone mode, you should downgrade resolution of LCD to 1024x768. The reason is: for refresh rates upper than 60Hz, the resolutions of two heads must be the same.
With respect to the discussion above, the /etc/X11/xorg.conf shoule looks like this:
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/100dpi"
FontPath "/usr/share/X11/fonts/75dpi"
# path to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection
Section "Module"
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" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "true"
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 Mobile 915GM/GMS/910GML Express Graphics Controller"
Driver "i810"
BusID "PCI:0:2:0"
EndSection
Section "Device"
Identifier "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for LCD of Separate"
Driver "i810"
BusID "PCI:0:2:0"
Option "MonitorLayout" "CRT,LFP"
Screen 0
EndSection
Section "Device"
Identifier "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for CRT of Separate"
Driver "i810"
BusID "PCI:0:2:0"
Screen 1
EndSection
Section "Device"
Identifier "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for Clone"
Driver "i810"
BusID "PCI:0:2:0"
Option "Clone" "true"
Option "CloneRefresh" "85"
Option "MonitorLayout" "CRT,LFP"
EndSection
Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-64
VertRefresh 43-60
EndSection
Section "Monitor"
Identifier "External Monitor"
Option "DPMS"
HorizSync 30-90
VertRefresh 50-160
EndSection
Section "Screen"
Identifier "Default Screen"
Device "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x800"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x800"
EndSubSection
EndSection
Section "Screen"
Identifier "LCD Screen Of Separate"
Device "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for LCD of Separate"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x800"
EndSubSection
EndSection
Section "Screen"
Identifier "CRT Screen Of Separate"
Device "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for CRT of Separate"
Monitor "External Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection
Section "Screen"
Identifier "LCD Screen Of Clone"
Device "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for Clone"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection
Section "Screen"
Identifier "CRT Screen Of Clone"
Device "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller for Clone"
Monitor "External Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "DefaultLayout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
InputDevice "Synaptics Touchpad"
EndSection
Section "ServerLayout"
Identifier "SeparateHeads"
Screen 0 "LCD Screen Of Separate" 0 0
Screen 1 "CRT Screen Of Separate" RightOf "LCD Screen Of Separate"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
InputDevice "Synaptics Touchpad"
EndSection
Section "ServerLayout"
Identifier "CloneHeads"
Screen "LCD Screen Of Clone"
Screen "CRT Screen Of Clone"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
InputDevice "Synaptics Touchpad"
EndSection
Section "DRI"
Mode 0666
EndSectionAfter editing xorg.conf, it turns off gdm.conf. by default, there is one section named [server-Standard] in /etc/gdm/gdm.conf which must be changed to:
[server-Standard] name=Standard server command=/usr/bin/X -br -audit 0 -layout DefaultLayout flexible=true After doing that, you should add some other server sections: [server-Separate] name=Separate Heads command=/usr/bin/X -br -audit 0 -layout SeparateHeads flexible=true [server-Clone] name=Clone Heads command=/usr/bin/X -br -audit 0 -layout CloneHeads flexible=true
ClaudeParoz: At least with latest versions of GDM, you should add these to /etc/gdm/gdm.conf-custom, so as your config don't get overwritten by GDM updates.
FredrikStahl: Under Feisty, remember to unset the "Disable multiple logins for a single user" option in gdmsetup. Also, I had to change the refresh rate from 85 to 60 Hz after upgrading to Feisty to avoid serious distortions on the external monitor, with the same hardware. Strange.
Ok, that's it. You must restart your computer and for changing mode, in gnome-terminal, type: gdmflexiserver and see what's happen!
Have fun, Habib Seifzadeh : habibseifzadeh@yahoo.com
HowtoSetupExternalMonitorForIntel915 (last edited 2008-08-06 17:00:34 by localhost)