ubuntu-bug won't show GUI window in pure wayland-sessions

[Marco Trevisan (Treviño)]

In case only `WAYLAND_DISPLAY` env variable is set (but no `DISPLAY` as XWayland is disabled), ubuntu-bug won't show its window, even though GTK will use the Wayland backend.

Test case, in an Ubuntu wayland session:
 - Run:
      env -u DISPLAY ubuntu-bug -w apport

You will get:

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marco@marco-virtual-machine:~$ Error: no DISPLAY environment variable specified
^C

---

So, ubuntu-bug should both consider `DISPLAY` and `WAYLAND_DISPLAY` to be enough to use a graphical session.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: apport 2.20.11-0ubuntu49
ProcVersionSignature: Ubuntu 5.8.0-22.23-generic 5.8.14
Uname: Linux 5.8.0-22-generic x86_64
ApportVersion: 2.20.11-0ubuntu49
Architecture: amd64
CasperMD5CheckResult: skip
CrashReports: 640:1000:125:21823957:2020-10-13 15:15:42.354004383 +0200:2020-10-13 15:15:43.354004383 +0200:/var/crash/_usr_bin_gnome-shell.1000.crash
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 13 15:22:34 2020
InstallationDate: Installed on 2020-10-13 (0 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Beta amd64 (20201013.1)
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)

[Benjamin Drung (bdrung)]

I cannot reproduce your problem and neither find a problem in the code.

Running "env -u DISPLAY ubuntu-bug -w apport" on a fresh Ubuntu 22.04 installation (with GNOME and wayland) opens apport-gtk correctly. Neither killing Xwayland nor only setting WAYLAND_DISPLAY by running "env -i WAYLAND_DISPLAY=wayland-0 ubuntu-bug -w apport" did change anything (note: apport-gtk crashed in the latter case, but it was called).

Supporting WAYLAND_DISPLAY as alternative was implemented in bug #1418766 long time ago.

Can you reproduce your problem? What environment are you in?

[Launchpad Janitor (janitor)]

[Expired for apport (Ubuntu) because there has been no activity for 60 days.]