up vote 27 down vote favorite
16

I'm using multiple monitors. When logged in everything I fine. Left monitor is positioned left and right monitor is positioned right, but before I login the login screen positions them the other way around.

This is also the position as used bij bios/grub, and I don't mind where the login is displayed, but when moving the mouse the boundary is the wrong way round, and that's annoying.

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up vote 52 down vote accepted

I was experiencing this too. So long as you have your monitors configured as you want them in your user space then you should be able to follow these steps to set your monitors up the same way on the log in screen:

  • Open a terminal
  • Type sudo cp ~/.config/monitors.xml /var/lib/lightdm/.config/
  • Enter user password
  • Reboot your computer

Kudos goes to this post over here for pointing me in the right direction: Wrong Login Screen Resolution

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Just wanted to say that this also worked for getting the monitor rotation set up correctly for the login screen. Thanks for the solution. +1 – reirab Mar 12 '14 at 19:06
4  
Thanks for pointing me in right direction but the same thing can be done with just one command from users home folder: sudo cp .config/monitors.xml /var/lib/lightdm/.config/ – Tanel Mae Mar 14 '14 at 17:26
    
This truly helpful solution!!! – Dmitry May 19 '15 at 7:33
    
On 14.04 this changes the login screen to be the same as one user, but doesn't set the default for all users. – mirams Jun 23 '15 at 9:24
    
I got a permissions error after copying and rebooting, so I needed to sprinkle in some "sudo chown lightdm:lightdm /var/lib/lightdm/.config/monistors.xml". Otherwise, excellent! – Nick Nov 12 '15 at 20:32
up vote 1 down vote

At least with Ubuntu 16.04, which includes lightdm-gtk-greeeter 2.0.1, the following entry in /etc/lightdm/lightdm-gtk-greeter.conf can be used to fix the initial position of the login dialog on a certain monitor. This setting isn't available via the settings UI.

[greeter]
active-monitor=0

The monitors.xml workaround didn't work here, too.

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Doesn't work with lightdm unity greeter, which is what I'm willing to use. – Anwar Apr 1 '17 at 13:34

protected by Sylvain Pineau May 1 '15 at 13:43

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