After a fair amount of grief, I got dual screens working on my office
EMC computer. I started by adding a PCI card and monitor to the
computer. As far as I could tell, Ubuntu has no display setup wizard
other than the screen resolution dialog, so after making a backup, I
changed /etc/X11/xorg.conf
(
http://www.wallacecompany.com/machine_shop/xorg.conf
)
directly with gedit, adding the "xorg new" text shown below. I also
changed the;
Section "Screen"/Identifier "Default"
to
Section "Screen"/Identifier "Screen1"
The biggest problem is in finding the real HorizSync, VertRefresh, Depth
and Modes values. I have found that guessing these values is a waste of
time and patience. Control/Alt F1 can be used to get to a command prompt
when you lose a legible screen. Logging out or Control/Alt Backspace is
supposed to reset X, but I found the only reliable way to invoke the
latest xorg.conf settings was to reboot.
One unexpected feature I have noticed is that you can't drag a window
from one screen to the other. You need to open the application in the
screen you want to use. So to have EMC running in the main screen and
Halscope in the other, I had to open Terminal in screen two and invoke
"halscope" from the terminal. I haven't done much beyond this and I am
wondering how much of EMC can be displayed on the other screen.
--- xorg new ---
Section "Device"
Identifier "S3 Inc. 86c764/765 [Trio32/64/64V+]"
Driver "s3"
BusID "PCI:0:19:0"
EndSection
Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 30-64
VertRefresh 50-100
EndSection
Section "Screen"
Identifier "Screen2"
Device "S3 Inc. 86c764/765 [Trio32/64/64V+]"
Monitor "Generic Monitor"
DefaultDepth 16
SubSection "Display"
Depth 8
Modes "800x600" "720x400" "680x510" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "800x600" "720x400" "680x510" "640x480"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen1"
Screen 1 "Screen2" RightOf "Screen1"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection
--
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)
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