SUMMARY I am using 3 monitors, 1 built-in from laptop(Lenovo) and 2 externals. I disabled the built-in screen most of the time. While it turned off, if I manipulate the brightness, mouse starts jiggling, stuttering or not moving smoothly. I tried disabled one of the external and enable the built-in, everything works. If I get back the brightness again, everything works. $ sudo journalctl -f | grep --line-buffered kde # When I manipulate the brightness (up or down): Jun 03 16:04:35 Arch dbus-daemon[577]: [system] Activating service name='org.kde.powerdevil.backlighthelper' requested by ':1.32' (uid=1000 pid=994 comm="/usr/lib/org_kde_powerdevil") (using servicehelper) # When I disabled (unticked `Enabled`) the built-in Screen: Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:20: TypeError: Cannot read property 'pluginName' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:75: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:78: TypeError: Cannot read property 'pluginName' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:80: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:81: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:82: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:83: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:84: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:16: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:17: TypeError: Cannot read property 'configuration' of null Jun 03 16:04:11 Arch plasmashell[942]: file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:18: TypeError: Cannot read property 'configuration' of null STEPS TO REPRODUCE 1. Untick `Enabled` of `built-in Screen` from `System Settings - Display Configuration`. 2. Manipulate the brightness. Up or down that does not matter. But not the same brightness as it was. 3. Mouse starts jiggling. If I Enabled built-in Screen again or get back to the original brightness, everything works. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Linux/KDE Plasma: ArchLinux KDE Plasma Version: 5.27.5 KDE Frameworks Version: 5.106.0 Qt Version: 5.15.9 ADDITIONAL INFORMATION
Are you using Wayland or X11?
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!