The Power Management KCM does not distinguish between AC, battery and low battery when on a machine without a battery (which makes perfect sense), but the "Activity Settings" tab there is still the "Act like" selectbox, which doesn't make sense in this situation. Reproducible: Always
Git commit 1cf565eeb3ddc98a2df0066b4e5258aaf1e25008 by Kai Uwe Broulik. Committed on 07/03/2016 at 13:30. Pushed by broulik into branch 'Plasma/5.6'. [Activity Settings] Hide "Act like" setting if there's no batteries FIXED-IN: 5.6.0 M +9 -9 daemon/powerdevilcore.cpp M +14 -0 kcmodule/activities/activitywidget.cpp http://commits.kde.org/powerdevil/1cf565eeb3ddc98a2df0066b4e5258aaf1e25008