CentOS 8.x gnome change default gdm from wayland to X11

A few applications such as Anydesk may not work properly if you use wayland gdm. To shift to X11 gdm permanently use following steps:

Check current login session numbers using:
```
loginctl
```
For a particular login session see session-type using:
```
loginctl show-session <session-number> -p Type
```
Edit '/etc/gdm/custom.conf' as follows:
1. Uncomment below line:
```
WaylandEnable=false
```
2. Insert below line after disabling Wayland as part of [daemon] section itself:
```
DefaultSession=x11
```
  Note if you use "DefaultSession=gnome-xorg.desktop" instead of x11 that is "X11 Classic" instead of "Standard X11" then activities search (Window button) does not works very nicely.
Reboot the machine and re-check. The session type should change from wayland to X11.

Refer:

Anonymous