Ubuntu 21.10 (Gnome 40): Option "click-action: minimize-or-previews" doesn't show preview of multiple windows

[mirao]

It seems to be a regression in Gnome 40 (or in Ubuntu 21.10 where I upgraded from 21.04 recently).
It worked for me in Ubuntu 21.04 (Gnome 3.38)

Steps to reproduce:

1. Dconf editor: Set the value minimize-or-previews in /org/gnome/shell/extensions/dash-to-dock/click-action
2. Start a few application windows, e.g. VSCode or Gnome Terminal
3. Switch to another application
4. Click on the VSCode icon in dock

Expected result:

• Preview of all VSCode windows is shown

Actual result:

• One of app's windows is focused, no preview is shown 🐞
• Then if you click to dock again, the app goes to background (is minimized) which is correct ✔️

I noticed that there is a similar option focus-minimize-or-previews which causes focusing of app and then one more click shows previews ✔️ . However I would like to use minimize-or-previews - I'm used to focus specific window manually by selecting of window in preview.

Used SW:

• Ubuntu 21.10
• Gnome Shell 40.5-1ubuntu2
• Ubuntu Dock 69

[mirao]

One of app's windows is focused, no preview is shown

Maybe related to #1358 (comment) ?

[pbogaard]

I am experiencing exactly the same. Just upgraded from the 20.04 Ubuntu version. It was working there.

[pbogaard]

Hurah! I found the bug. Apparently the bug was with ubuntu-dock.

Here is the solution:

In /usr/share/gnome-shell/extensions/ubuntu-dock@ubuntu.com/appIcons.js at line 472:

change
const singleOrUrgentWindows = windows.length === 1 || !hasUrgentWindows;
to
const singleOrUrgentWindows = windows.length === 1 || hasUrgentWindows;

(basically removing the ! sign before hasUrgentWindows)

Then log-out & log-in again.

[mirao]

@pbogaard The fix works, thanks!
Well, the bug was reported also to Ubuntu's gnome-shell-extension-ubuntu-dock here.
It seems that the latest https://github.com/micheleg/dash-to-dock/blob/master/appIcons.js has it already fixed:

dash-to-dock/appIcons.js

Line 475 in a23f0c5

const singleOrUrgentWindows = windows.length === 1 || hasUrgentWindows;

Maybe only the Ubuntu package gnome-shell-extension-ubuntu-dock uses broken version?

[mirao]

@pbogaard As for a fix to gnome-shell-extension-ubuntu-dock, it should be possible to fork Ubuntu repo and propose a fix. Here are specific instructions, if you sign up to Launchpad: https://code.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock