Hi again. Seems that my case is connected to my NVIDIA card and this bug:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1525735 The following solved my problem: sudo apt install xserver-xorg-legacy In /etc/X11/Xwrapper.config I replaced allowed_users=console with allowed_users=anybody -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1562219 Title: xinit will not work as non-root. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xinit/+bug/1562219/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
