** Description changed:
Binary package hint: displayconfig-gtk
Where possible, displayconfig-gtk should generate an xorg.conf file that
uses RandR 1.2 rather than the older xinerama server code, as it makes
better use of the card's features (e.g. sharing a single framebuffer for
multiple monitors), and allows runtime reconfiguration of the displays.
There is some information on configuring an initial RandR 1.2 layout
available on the Intel Linux Graphics website:
http://www.intellinuxgraphics.org/dualhead.html
The instructions there worked when configuring dual head on my Radeon
9200SE, modulo different naming of the outputs. To configure the
"DVI-0" and "VGA-0" outputs on my system, I used the following
configuration fragment:
Section "Device"
Identifier "ATI Technologies Inc RV280 [Radeon 9200 SE]"
Driver "ati"
BusID "PCI:1:0:0"
Option "monitor-DVI-0" "Sony SDM-S74 [1]"
Option "monitor-VGA-0" "Sony SDM-S74 [2]"
EndSection
Section "Monitor"
Identifier "Sony SDM-S74 [1]"
Option "DPMS"
HorizSync 30-65
VertRefresh 50-75
Option "LeftOf" "Sony SDM-S74 [2]"
EndSection
Section "Monitor"
Identifier "Sony SDM-S74 [2]"
Option "DPMS"
HorizSync 30-65
VertRefresh 50-75
EndSection
Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies Inc RV280 [Radeon 9200 SE]"
Monitor "Sony SDM-S74 [1]"
DefaultDepth 16
SubSection "Display"
Modes "1280x1024" "1024x768" "800x600" "640x480"
Virtual 2560 1024
EndSubSection
EndSection
One quirk I noticed was that I could not specify the position of the
VGA-0 monitor relative to the DVI-0 monitor -- I needed to do the
opposite. From a look at the "xrandr" command line tool output, this is
probably because the VGA-0 output is the first one, and they set up the
outputs in order so it doesn't know how to process the positioning
option.
+
+ ---
+
+ GNOME control center folks have said they prefer a C-based solution to
+ this, so rather than add xrandr to displayconfig-gtk, they suggested
+ merging efforts with Soren's work.
** Summary changed:
- displayconfig-gtk should generate an randr 1.2 configuration where possible
+ GUI screen config tool should generate an randr 1.2 configuration where
possible
--
GUI screen config tool should generate an randr 1.2 configuration where possible
https://bugs.launchpad.net/bugs/144641
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