Bug 435895

Summary:	Display Configuration applet's "Presentation Mode" is secretly still active after being turned off
Product:	[Plasma] KScreen	Reporter:	Peri <peri.com>
Component:	Plasma Applet	Assignee:	kscreen-bugs-null <kscreen-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	ecc_2000, kde, materka, nanabaahgyan, nate
Priority:	NOR
Version:	5.21.4
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Peri 2021-04-19 01:26:56 UTC

SUMMARY

When you enable the "Presentation Mode" option accessible from the Display Configuration icon from the System Tray and disable it again, it will still be enabled until you restart plasmashell.

STEPS TO REPRODUCE
1. Check the option "Presentation Mode" from the Display Configuration icon from the System Tray to enable it
2. Check it again to disable it


OBSERVED RESULT
The Presentation Mode will be kept enabled even when the checkbox is unchecked: the screen won't automatically be turned off as expected from "Screen Energy Saving" setting, not sure about the automated suspension since I don't use it. Killing plasmashell and starting it again "fixes" the issue.

EXPECTED RESULT
When unchecking the Presentation Mode box from the Display Configuration menu it should disable the mode.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

Comment 1 Nate Graham 2021-04-21 20:23:42 UTC

Can confirm. Interestingly enough, the Battery & Brightness applet doesn't list any active inhibitions while Presentation Mode is on, so it must be using some other mechanism to suppress power management. Perhaps it's just a matter of porting it to use the normal method.

Comment 2 ecc_2000 2021-05-06 17:32:20 UTC

Also noticed this bug on Manjaro.

KDE Plasma Version: 5.21.4
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.11.18-1-MANJARO

Comment 3 nbgyan 2021-09-11 11:28:54 UTC

Can confirm this too.

Operating System: KDE neon 5.22
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.3
Kernel Version: 5.11.0-34-generic (64-bit)

Comment 4 Nate Graham 2021-09-14 16:34:34 UTC

Aha, this was fixed automatically by the fix for Bug 433675, since they use the same data source!

*** This bug has been marked as a duplicate of bug 433675 ***