"Error: Can't open display: wayland-0" on 22.04/gdm3

Frobozz

11/6/23, 5:26 PM

I am building a new workstation environment on Ubuntu Server 22.04 and manually installing just the minimal desktop components necessary to manage a half dozen libvirt/QEMU/KVM virtual machines (where I do all the real work).

I am having difficulty getting some of my tools (notably imagemagick) to run on the host desktop getting "Error: Can't open display: wayland-0". I get the same running test programs like glxgears and xeyes.

If I disable wayland in /etc/gdm3/custom.conf

[daemon]
# Uncomment the line below to force the login screen to use Xorg
WaylandEnable=false

these apps all work (but create other problems for me that I won't go into here).

UPDATE: I decided to come at this from the reverse side: I built Ubuntu Desktop 22.04 instead and stripped out all the "productivity" software. This works fine so there must be some package (some part of xWayland, maybe?) I was missing in the Server build but don't have time to identify it.

1004

0 + 2

gdm

xorg

wayland

ubfan1

11/27/23, 5:52 PM

You may answer your own question helping others with this issue and gaining some rep in the process.

Frobozz

11/27/23, 6:21 PM

@ubfan1, doesn't feel like an answer to me. I am still hoping someone can identify what I missed in the Server build so I can use it next time I build a workstation.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: "Error: Can't open display: wayland-0" on 22.04/gdm3

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