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To fight with dual-monitor resolution problems, I followed the advice found in other questions here related to session- and display-setup-script. I have the following /etc/lightdm/lightdm.conf:


I also have the following (executable) /usr/bin/dualmon.sh that I created:


xrandr --output LVDS1 --auto --left-of HDMI1 --output HDMI1 --auto
# notify-send Dualscreen activated

touch /home/shade/Desktop/touched

However, the resolution is wrong both at the login screen and after I log in. Also, the file /home/shade/Desktop/touched is not there. When I run the dualmon.sh script manually (after I log in), the resolution is set correctly.

This makes me think that the scripts are not run at all. What is the cause of this and how can I fix it?

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I'm seeing the exact same problem. Attempting to setup i3 on Ubuntu 12.04.3, nearly fresh install. If you found a solution, please answer your own question. :) –  dfarrell07 Sep 11 '13 at 19:05
I did find a sort of solution, where the script would only run if the display-setup-script config directive wasn't set, or something. However, I have since migrated to 13.04, where I don't seem to have this problem. Or, I did have it, but can't find anything related to it on my current install. Sorry. –  Shade Sep 12 '13 at 7:51
Okay, thanks for the info. Until I figure something else out, I'm just running an xrandr script after login to fix my display. –  dfarrell07 Sep 13 '13 at 18:27
can you try to disable the two scripts, and put it only in greeter-setup-script? also, please check your bash script is really executable :) –  Starry Mar 3 '14 at 8:49
@Starry, the issue no longer manifests itself on a vanilla 13.10 installation, so the question is mostly defunct. Thanks for the suggestion, though. –  Shade Mar 3 '14 at 10:10

1 Answer 1

Have you checked the file permissions? You need to make sure that it's executable by a root user. This post should help.

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It's executable for all users. I can execute the script both with my user and suid. –  Shade Apr 8 '13 at 15:07
Just for fun, does it execute the display-setup-script when you switch the two? I've got a config where it executes the display-setup-script but then ignores the following session-setup-script. –  J.T. Blum Apr 9 '13 at 17:15

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