> On my system the touchscreen keeps working after using a QML app. It still gets gestures (e.g 3 fingers on the screen) but it won't work on some windows. Furthermore, I can't drag windows by the decoration any more.
Multifinger gestures keep working because they do not depend on pointer/mouse events, which is what gets broken here (namely "mouse pointer emulation from touch events"). They use touch events directly.
> On my system the touchscreen keeps working after using a QML app. It still gets gestures (e.g 3 fingers on the screen) but it won't work on some windows. Furthermore, I can't drag windows by the decoration any more.
Multifinger gestures keep working because they do not depend on pointer/mouse events, which is what gets broken here (namely "mouse pointer emulation from touch events"). They use touch events directly.