(Solved) Dual monitors shows up in ATI CCenter, but KDM doesn't want to know.

[Treq]

Hi all,

I am trying to go from XP to Kubuntu on my work-machine, but I can't for the life of me get the 2nd monitor to work.
-------------------------------
Desktop machine (Intel 2-core Pentium D) with a single ATI X1300 videocard with two CRT outputs.
Kubuntu 8.10, 64-bits version with all updates applied (05. Feb 2009)
Monitor left: HP LP2065 at 1600x1200.
Monitor right: HP L1730 at 1280x1024
Standard restricted ATI driver installed 8.54.3
-------------------------------
Have run: "aticonfig -–initial=dual-head –screen-layout=left" to create a dual-head config file.
This gave the following xorg.conf:
=======================================
Section "ServerLayout"
Identifier "aticonfig Layout"
Screen 0 "Default Screen" 0 0
Screen "aticonfig-Screen[0]-1" RightOf "Default Screen"
EndSection

Section "Files"
EndSection

Section "Module"
Load "glx"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[0]-1"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "Configured Video Device"
Driver "fglrx"
Option "EnableMonitor" "crt1,crt2"
BusID "PCI:1:0:0"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]-1"
Driver "fglrx"
BusID "PCI:1:0:0"
Screen 1
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Configured Video Device"
Monitor "Configured Monitor"
DefaultDepth 24
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]-1"
Device "aticonfig-Device[0]-1"
Monitor "aticonfig-Monitor[0]-1"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
=======================================

When logging in, the left monitor works perfectly but the right monitor not.
When I move the mouse from the left monitor over to the right monitor, it changes to "X" shape when on the right monitor. I can't drag any windows onto the right monitor or use it in any other way.

ATI Catalyst control-center:
Shows the two analogue monitors (1) and (2). Detects correctly the brand and model. When I go on the tab "multi-display" I only get one choice there: "Single (Independent display)". This is the case for both monitors.

Screen Resize and Rotate (KRandRTray):
Shows two screens: Screen1 and Screen2. It shows the correct resolutions for the two monitors.

System settings/Display:
Only shows one monitor called "default (Connected)" at 1600x1200. Pressing "Identify outputs" puts the word "default" on the left monitor, and nothing on the right monitor.
-------------------------------
So it seems to me that X is correctly set up and working, since I get the X-mouse on the right monitor as well as XRandR and ATI-CCC correctly reporting on the monitors.

So why doesn't KDM know about it and want to manage the second monitor?

Does anyone have any ideas?

Best regards,
Treq

[Treq]

Re: (Solved) Dual monitors shows up in ATI CCenter, but KDM doesn't want to know.

I'll reply to myself here.

I found the solution in the kde forums.
http://forum.kde.org/second-monitor-...4-t-12010.html

The basic idea is that one has to enable "Xinerama (Called TwinView on nVidia cards and Big Desktop on ATi)" and not run dual-head mode.

With a single ATI graphics card with two outputs, this tutorial worked well for me:
http://ubuntuforums.org/showthread.php?t=301941

Cheers,
Treq