Enable remote control to work even before logging in Ubuntu

Problems

Login to remote PC is not working anymore after rebooting Ubuntu 20.04 remote machine

Solutions

1. SSH to the remote machine

2. Edit file "/etc/gdm3/custom.conf"

3. Add the line "WaylandEnable=false"

4. Restart the gdm with "sudo systemctl restart gdm3"

5. Re-login teamviewer

References

• https://linuxconfig.org/how-to-enable-disable-wayland-on-ubuntu-20-04-desktop
  
• https://community.teamviewer.com/English/discussion/103999/cant-remotely-control-ubuntu-20-after-a-reboot-until-i-log-in-on-the-physical-server