Bug 416982

Summary:	"Show only tasks from the current screen" option makes task list empty when external display is unplugged.
Product:	[Plasma] plasmashell	Reporter:	csabi
Component:	Task Manager and Icons-Only Task Manager widgets	Assignee:	Eike Hein <hein>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	nate, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.17.5
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description csabi 2020-01-31 11:22:47 UTC

SUMMARY


STEPS TO REPRODUCE
1. Plug in an external display (hdmi), and have a different taskbar on both screens.
2. Turn on "Show only tasks from the current screen"
3. Unplug the external screen

OBSERVED RESULT
The task manager is empty on the laptop screen

EXPECTED RESULT
Task manager should show all opened applications as there is a single screen now.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.66.0
Qt Version: 5.14.0

ADDITIONAL INFORMATION

If KDE is started with a single screen, the task manager does show all tasks. The problem appears only when the display is removed. I think there is some state kept where the system thinks there is still another screen, even though the display settings shows a single one.
It is 100% reproducible on my system. (The external display has a higher resolution, the taskbars are vertical.)

Comment 1 Nate Graham 2020-01-31 20:49:28 UTC


*** This bug has been marked as a duplicate of bug 414743 ***