Hi there,
I’m new here, trying to find some help with an issue I cannot solve myself.
I’m using KUbuntu for a while now (switched from Arch Linux due to my ongoing research work) and sometime one of my screens turns black for a few seconds and the system seems to not using it for that period of time. Afterwards, it turns on again and works just fine.
After some troubleshooting I found the following logs in my journalctl:
Dez 10 09:34:45 lennard kwin_x11[2066]: kwin_core: Parse error in tiles configuration for monitor "5b7a5ba4-43cc-5910-8e98-f358f9d54b43" : "illegal value" Creating default setup
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:18: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:17: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:16: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:84: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:83: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:82: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:81: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:80: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:78: TypeError: Cannot read property 'pluginName' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:75: TypeError: Cannot read property 'configuration' of null
Dez 10 09:34:45 lennard plasmashell[2147]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:20: TypeError: Cannot read property 'pluginName' of null
So, I looked at the mentioned main.qml file, but from there on I’m lost due to my missing knowledge of QML…
Maybe someone can give me some guidance on how to further troubleshoot, or even give me a solution to my problem. 
If any furhter information is needed please reach out to me.
My System is a Lenovot ThinkPad E15 Gen2 with an AMD processor and AMD Radeon graphics (onboard, no dedicated GPU).
Thanks in advance and best regards,
Basti
