gnome-terminal thinks it is byobu (under LXQt)

[decimus]

This is a very similar case to "gnome-terminal thinks it's Byobu Terminal", see https://bugs.launchpad.net/ubuntu/+source/byobu/+bug/1512498 . Just that this time it does not affect the default Ubuntu desktop environment, but only LXQt, the Lubuntu 18.10 desktop environment which I installed on top of Ubuntu 18.10. (Since the byobu package is the same for Ubuntu, I though this would be the best place to report.)

When typing gnome-terminal into the LXQt launcher (Alt+F2), gnome-terminal will appear with the byobu icon on it, and when executing gnome-terminal from there, byobu terminal will start instead.

When moving the desktop file /usr/share/applications/byobu.desktop away, this behavior is instantly fixed.

lsb_release -rd
Ubuntu 18.10

apt-cache policy byobu
5.127-0ubuntu1

[Christian Ehrhardt  (paelzer)]

Hi decimus,
thank you for your report to make Ubuntu better.
Unfortunately .desktop files sometimes are like a dark mystery to me, I don't see how the file

ll /usr/share/applications/byobu.desktop
lrwxrwxrwx 1 root root 42 Jan 31 03:09 /usr/share/applications/byobu.desktop -> /usr/share/byobu/desktop/byobu.desktop.old*

cat /usr/share/byobu/desktop/byobu.desktop.old
[Desktop Entry]
Name=Byobu Terminal
Comment=Advanced Command Line and Text Window Manager
Icon=byobu
Exec=env TERM=xterm-256color byobu
Terminal=true
Type=Application
Categories=GNOME;GTK;Utility;
X-GNOME-Gettext-Domain=byobu

could cause the issue you describe.
But hearing that moving it away immediately fixes it means it is related.

I subscribed didrocks who uploaded the last fix and also has a much better understanding of the Desktop.
Hoping he might be able to help here ...

[decimus (h-matthias-u)]

I should have included the file as well. Unlike for you, /usr/share/applications/byobu.desktop was a file on my system and not a symlink. And the content was different:

cat /usr/share/byobu/desktop/byobu.desktop.old

[Desktop Entry]
Name=Byobu Terminal
Comment=Advanced Command Line and Text Window Manager
Icon=byobu
Exec=gnome-terminal --app-id us.kirkland.terminals.byobu --class=us.kirkland.terminals.byobu -e byobu
Type=Application
Categories=GNOME;GTK;System;Utility;TerminalEmulator;
StartupWMClass=us.kirkland.terminals.byobu
X-GNOME-Gettext-Domain=byobu

[Didier Roche-Tolomelli (didrocks)]

Hey!

I think the issue is on LXQt and desktop detection itself. It should honor "StartupWMClass=" and not rely only on the binary which is ran (which is gnome-terminal, hence the confusion for this desktop).

I'm unsure though which LXQt component is handling desktop detection. Feel free to retarget to the correct one.

[Christian Ehrhardt  (paelzer)]

Thanks didrocks, not knowing any better I've filed it against the lxqt-metapackages assuming that LXQt packagers will sooner or later re-task it to the right component in LXQt

[apt-ghetto (apt-ghetto)]

Hi,

I was unable to reproduce this bug on an up-to-date Lubuntu 19.04. But then I tried it also on an up-to-date Lubuntu 18.10 and found out, that this bug is reproducible under certain circumstances. Additionally I used also xprop WM_CLASS:

On 18.10:
  - install first gnome-terminal and in a second step byobu
    Using lxqt-runner it opens byobu in a gnome-terminal
    Using lxqt-runner you cannot open gnome-terminal, because it is not suggested
      WM_CLASS(STRING) = "gnome-terminal-server", "us.kirkland.terminals.byobu"
  - install first byobu and in a second step gnome-terminal
    Using lxqt-runner it opens byobu in a qterminal
    Using lxqt-runner it opens gnome-terminal
      WM_CLASS(STRING) = "qterminal", "qterminal"
      WM_CLASS(STRING) = "gnome-terminal-server", "Gnome-terminal"

On 19.04:
  - install first gnome-terminal and in a second step byobu
    Using lxqt-runner it opens byobu in a gnome-terminal
    Using lxqt-runner you can open also gnome-terminal
      WM_CLASS(STRING) = "gnome-terminal-server", "us.kirkland.terminals.byobu"
      WM_CLASS(STRING) = "gnome-terminal-server", "Gnome-terminal"
    Ergo: It is not reproducible
  - install first byobu and in a second step gnome-terminal
    Using lxqt-runner it opens byobu in a qterminal
      WM_CLASS(STRING) = "qterminal", "qterminal"
      WM_CLASS(STRING) = "gnome-terminal-server", "Gnome-terminal"

On 18.10, installing first gnome-terminal and then byobu: if you purge gnome-terminal, byobu doesn't work anymore.

[apt-ghetto (apt-ghetto)]

Setting to incomplete, because 18.10 is out of support and with 19.04 I could not reproduce it.

[Launchpad Janitor (janitor)]

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

[Launchpad Janitor (janitor)]

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