intel dualhead don't fly
Cry Regarder
cry_regarder at yahoo.com
Wed Aug 22 13:01:44 PDT 2007
Folks,
I am trying to configure (fedora 7) a dualhead
configuration on a Q965 motherboard with two monitors.
I have a Dell 1800 LCD hanging off the VGA port. This monitor supports
1280x1024. I have a Dell 2407WFP which runs at 1920x1200, 60hz on the
DVI port (ADD2 card).
If only the DVI monitor is connected I can bring it up at 1920x1200 no problem. If only the VGA monitor is connected, it comes up at 1280x1024 without problem.
If I then plug in the other monitor, I can get an xrandr output:
-----------------------------xrandr----------------------
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 4000 x 1200
VGA connected (normal left inverted right)
1280x1024 60.0 + 75.0 59.9
1152x864 74.8
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
TMDS-1 connected 1920x1200+0+0 (normal left inverted right) 519mm x 324mm
1920x1200 60.0*+
1600x1200 59.9
1680x1050 60.0
1280x1024 75.0 59.9
1152x864 74.8
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
-----------------------------xrandr----------------------
In this case, TMDS-1 is the initial monitor. If I do a
xrandr --output VGA --left-of TMDS-1 --mode "1280x1024"
It seems to work, except that the VGA monitor has no picture until the mouse moves onto it and then it goes crazy like the timings are all bad. This happens at all the above resolutions.
I have to do a xrandr --output VGA --off
A similar phenomenon happens if I start with the VGA monitor. I've tried many different modelines, refreshes, etc. Very rarely, I will get both monitors working, but then when I restart X, they won't be.
One of the xorg.conf's I've tried:
--------------xorg.conf--------------
Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
Section "Monitor"
Identifier "Monitor0"
ModelName "Dell 2407WFP (Digital)"
Option "dpms"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "intel"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Virtual 4000 1200
EndSubSection
EndSection
--------------xorg.conf--------------
I've also tried turning on and off swcursor with no change in behavior.
Thanks for any suggestions on how to get this setup running reliably! Also, where is the best place to put xrandr scripts for repeatable configurations? Can they be specified in gdm so the choices can be selected prior to login?
Cry
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