Bug 428809

Summary:	Desktop effects suspended after changing the Switch Display
Product:	[Applications] systemsettings	Reporter:	joseteluisete <josete>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	kde
Priority:	NOR
Version First Reported In:	5.20.2
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description joseteluisete 2020-11-07 22:13:47 UTC

SUMMARY
Every change on the  Switch Display (Meta + P) launches the message "Desktop effects have been suspended by another application"

STEPS TO REPRODUCE
1. Open the Switch Display
2. Change something
3. 

OBSERVED RESULT
Message "Desktop effects have been suspended by another application"

EXPECTED RESULT
No message

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Manjaro Linux 20.2
KDE Plasma Version: 20.2
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Kernel 5.8.18-1

ADDITIONAL INFORMATION
I've seen this using every KDE Plasma version for the last 2 or 3 years. That's the time I've been using Linux.
I mean versions 5.18.*, 5.19.*, 5.20.*
It's happened on several computers.
I use a Monitor and a TV.
My solution is to set "Unify Outputs". This is not a good solution because the resolution of the 2 devices is not exactly the same and in the process of Login there's a glitch when the monitor adapts to the resolution of the TV (a bit bigger).

Comment 1 joseteluisete 2020-12-29 20:15:24 UTC

I read in a Manjaro forum I should install ...
Desktop Effects > Background contrast

I did it and now I can't reproduce this bug.
It seems this trick solves the problem.

Greetings!