QA » QE-Workstation

SLED15 is using Wayland by default, there are two ways to figure out
which type of session you're running.

1. Wayland session should have WAYLAND_DISPLAY variable set, X11 session should not have it:
   $ echo $WAYLAND_DISPLAY
   wayland-0
   
2. loginctl can give you this information.
   First run 'loginctl' in terminal and find your session number
   (it should be an integer number, with your username and seat assigned). Then look at the session type (x11 or wayland):
   $ loginctl show-session <YOUR_NUMBER> -p Type
   Type=x11/wayland
   

Steps:

1. Boot to desktop and uncoment ""WaylandEnable=false"" in /etc/gdm/custom.conf to
   force the login screen to use Xorg, then reboot your system.
   
2. Log in using the default desktop session(SLE-Classic), check your session type.
   
3. Log out, click the gear button on log in screen, switch to 'GNOME' then log in.
   Check your session type after logging in.
   
4. Log out, click the gear button on log in screen, switch to 'GNOME-Classic' then log in.
   Check your session type after logging in.
   
5. Log out, click the gear button on log in screen, switch to 'GNOME on Xorg' then log in.
   Check your session type after logging in.
   
6. Log out, click the gear button on log in screen, switch to 'icewm' then log in.
   Check your session type after logging in.

Expected Results:

1. custom.conf could be changed and the system could be restared without any error.

2-3. Log in successfully, Wayland-based GNOME session should fallback to
X11-based session so your session type should be x11.

4-6. Log in successfully and your session type should be
x11.