Hello,

I have been using ubuntu for some time now with the gnome GUI. I recently decided to try out KDE.

I have KDE 4.4.5 version installed, kernel version 2.6.32-32-generic.
Graphic Controller by Intel.

The System Settings->Display does not detect dual monitors when logged on in KDE environment. I configured the display settings and clicking in Identify Outputs tells that both monitors are VGA1 and DVI1. [one of them should be VGA1 and other DVI1]

Apply settings at this place simply logs me out.

Logging on with the gnome environment, System-> System Settings -> Identify recognises the dual monitors correctly.

Thanks,
Sachin

Your kde version is quite out of date. The recent 4.7 release has some very nice improvements in multi-monitor handling.

For now, I suggest you use xrandr instead. First, add krandrtray to your system tray temporarily and make sure that the "unify outputs" option is unchecked. This option is only visible in krandrtray and plays havoc with multi-monitor setups that don't involve cloning displays. You can then remove krandrtray from you system tray.

Next, use xrandr -q to verify the output names. I'll assume they are DVI1 and VGA1 and you want the DVI1 to be your primary. Open a terminal and run this command:

Code: Select all

xrandr --output DVI1 --primary --output VGA1 --right-of DVI1

You can see how simple it is to string along options for the two displays... You can even add an --auto option to set each display to their preferred resolution:

Code: Select all

xrandr --output DVI1 --auto --primary --output VGA1 --auto --right-of DVI1

Hope that helps!

Hi Karthik,

I tried out the solution you suggested. Seems that the issue is that two screens are not detected by KDE.

$xrandr -q
output:

Screen 0: minimum 320 x 200, current 1440 x 900, maximum 4096 x 4096
VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 408mm x 255mm
1440x900 59.9*+ 75.0
1280x1024 75.0 60.0
1280x800 59.8
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
DVI1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 408mm x 255mm
1440x900 59.9*+ 75.0
1280x1024 75.0 60.0
1280x800 59.8
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1


Clicking on the Screen Settings icon both the VGA1 and DIV1 screens are under Screen 1. The Unify output setting is turned OFF. The identify Outputs
does not recognize the two monitors.

Thanks,
Sachin

Your xrandr -q output suggests that both screens are indeed detected — the VGA1 and DVI1 outputs. So, that's good news.

When you boot your computer (with both monitors plugged in), you should see the boot up sequence happening on both monitors. By default, both monitors will be cloned displays, right up to the point when you need to enter your login/password. After you login, KDE takes over.

Did typing the command I mentioned in my post help at all? Don't worry about the GUI. It rarely worked satisfactorily prior to 4.7. See this blog post for more details on that...

If my command didn't work and/or you really want to do this the GUI way, start fresh. The monitor setup is written down in ~/.kde/share/config/krandrrc. Delete or move this file someplace and then try again.

I managed to solve this issue by deleting all the files from ~/.local/share/kscreen . Hope this helps