#StackBounty: #19.04 How to restart X Window Server from command line and be able to login again afterwards?

Bounty: 50

I am using Ubuntu 19.04 (Disco Dingo). My question is the same as this old one: How to restart X Window Server from command line?

However, the much upvoted answer there does not work for me. When I run sudo systemctl restart display-manager as suggested there, the window system is restarted but then after that I cannot login, it seems like the window system is restarted again at each login attempt. So then I anyway need to reboot to make things work again. So that does not achieve what I want. What I would like is to be able to restart the window system without doing a full system reboot.

The other suggestion in the old answer was to check which display manager is used by doing cat /etc/X11/default-display-manager (in my case this gives /usr/sbin/gdm3) and then run sudo restart gdm but that gives me an error message: sudo: restart: command not found.

Is there a way to restart the X window system in Ubuntu 19.04 without doing a full reboot, and be able to login again afterwards?

Edit: I also tried systemctl restart gdm but that gives the same problem as sudo systemctl restart display-manager — the window system is restarted but after that I cannot login, need to reboot to make things work again.


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