I am using Ubuntu 17.10, wayland and gnome in a 3 monitors configuration. And the monitor in the middle is rotated to vertical orientation. When I log in all works well, but the login screen is rotated to the left.

How do I configure the login screen to use the monitor in the middle in vertical position


After looking for a while I used a combination of solutions, between lightdm and and older gdm.

First, you must log for the first time and configure every monitor in the way you want.

Then, copy the ~/.config/monitors.xml file to /var/lib/gdm3/.config folder.

Log out and gdm should be using your configuration

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