KDE; Systemsettings crash after entering "Compositor"

[tomsiduction]

Hello
I am using KDE Plasma 5.17.5 with Frameworks 5.62.0 and QT Version 5.12.5 (64 bit)

In "Systemsettings" I cannot open "Compositor". If I select "Compositor" systemsettings crashes.

Any idea what to do?


Regards

[der_bud]

No idea what to do, but a short "me too" . Other settings than those under display work well, but on entering submenu 'compositor' or 'gamma', systemsettings immediately crash.

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EDIT:  When I go to a terminal and enter

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kcmshell5 kwincompositingthe compositor settings dialog opens, and changes can be made and applied. (kcmshell5 --list gives an overview of all systemsetting modules).

[tomsiduction]

Hello
Thank you very much for your help

Regards

[der_bud]

Update/Workarounds (kind of) to this:

I found this forum entry about a similar bug, https://www.linuxquestions.org/questions/slackware-14/%5Bktown%5D-selecting-regional-settings-crashes-system-settings-4175671456/ ,and when I do as mentioned there in a terminal

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$ QT_QUICK_CONTROLS_STYLE=Base systemsettings5Systenmsettings work without error. So seems to be a bug that has to do with themes/styles.

Then there is KDE Bug #419625, https://bugs.kde.org/show_bug.cgi?id=419625#c2 , and there

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...the problem appears when upgrading kscreen from 5.16.5 to 5.17.0

I've done further investigation and found the following:
in kcm/package/contents/ui/Output.qml:231, when I remove maskSource from OpacityMask item, the problem vanishes (tag v5.17.0)
Problem appears after commit 6309d33 and yes, I commented the said line in the file /usr/share/kpackage/kcms/kcm_kscreen/contents/ui/Output.qml and no more segfaults. At least more people noticed and working at it...

[hendrikL]

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