On Mon, 23 Oct 2017, Carl W. Soderstrom wrote: > On 10/22 12:59 , Mike Miller wrote: > >> I upgraded to Ubuntu 17.10 and soon found that some things were not >> working. Apparently the root of the problem is that my monitor is now >> using DISPLAY=:1. I don't know why. I have only one monitor. It >> ought to be DISPLAY=:0. Any ideas? > > Got a stale lockfile in /tmp/.X11 or someplace similar? That's usually > what causes that issue. Thanks for the pointer, but that didn't happen to work. I tried about 100 things and went down 100 blind alleys before I figured out that the problem was incompatibility of the Gnome Wayland display server with Nvidia drivers. I uninstalled the drivers and things suddenly worked. Before at the login screen, I couldn't choose "Ubuntu", just "Ubuntu Xorg". Before, logging into Ubuntu Xorg: $ echo $DISPLAY :1 $ echo $XDG_SESSION_TYPE x11 After, logging into Ubuntu: $ echo $DISPLAY :0 $ echo $XDG_SESSION_TYPE wayland I also created ~/.config/monitors.xml and moved it to /var/lib/gdm3/.config/ based on what I read here: https://askubuntu.com/questions/966688/ubuntu-17-10-is-not-running-wayland I'm not sure if that was needed, but like the OP on that thread, I was using more memory before I got Wayland working. Anyway, I'm happiear now. Mike