https://bugs.kde.org/show_bug.cgi?id=422697

            Bug ID: 422697
           Summary: Task manager doesn't group Firefox after reboot.
           Product: plasmashell
           Version: 5.10.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Task Manager
          Assignee: h...@kde.org
          Reporter: linuxguy...@gmail.com
                CC: plasma-b...@kde.org
  Target Milestone: 1.0

SUMMARY

Task manager doesn't group Firefox after reboot.

STEPS TO REPRODUCE
1. Add a panel.  Add a task manager widget.  Behavior -> Group by program name,
open groups in popup.  Disable Group only when task manager is full.  Sort
manually. Keep launchers separate.  Show only tasks from current desktop.  Show
only tasks from current activity.


2. Open 20 to 50 Firefox instances.  Observe that they group properly in task
manager.


3. sudo reboot


OBSERVED RESULT

The workstation reboots properly.  The Firefox instances all restart and appear
as individual items in Task Manager.  Task Manager does not group them at all.

To get them to regroup, one must manually open every instance on the desktop
and then minimize it.  This is a very time consuming process if you have a
large number of instances open.   When you minimize the instances, Task Manager
groups them properly.

It appears that Task Manager must group upon a window minimize event.   I think
on startup after a reboot it will need to group on something else.


EXPECTED RESULT

After reboot all the Firefox instances should be grouped into one Task Manager
item for Firefox. 


SOFTWARE/OS VERSIONS

Linux/KDE Plasma:  Fedora 32.
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.13.2

$ uname -a
Linux bigboy 5.6.16-300.fc32.x86_64 #1 SMP Thu Jun 4 18:08:38 UTC 2020 x86_64
x86_64 x86_64 GNU/Linux


ADDITIONAL INFORMATION

Plasma rocks!  Keep up the excellent work.

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