I'm using Ubuntu 17.04 and Gnome 3 with gdm3 3.24. I have two external displays connected to my laptop. I usually keep the laptop lid closed, so only the external displays are enabled, and this works fine.

However, when I log out, the login screen with username/password fields is only displayed on the closed laptop screen, and the external displays are blank. (The external displays are enabled but only show the login screen background color, no content.)

I would like to have the login screen content mirrored across all displays when logged out. Is that possible?

I tried configuring my displays for mirroring and copying that $HOME/.config/monitors.xml file to /var/lib/gdm3/.config, but that did not produce any change.

  • Did you find the solution? Oct 11 '17 at 21:04
  • @angelcervera Nope
    – user4851
    Oct 12 '17 at 22:18

Have a look here:

To check your current setting:

$ cat /sys/module/button/parameters/lid_init_state

To fix your settings simply use this:

$ sudo nano /etc/default/grub
$ sudo update-grub

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