https://bugs.kde.org/show_bug.cgi?id=402247

            Bug ID: 402247
           Summary: Touchscreen input interpreted incorrectly on
                    multi-head setups
           Product: plasmashell
           Version: 5.14.4
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Multi-screen support
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: 1.0

STEPS TO REPRODUCE
1. With a touchscreen laptop, configure a multi-head setup with the laptop on
the right and an external (non-touch) monitor on the left.
2. Try to use the laptop's touchscren to control widgets located there.

OBSERVED RESULT
The touch location is interpreted as if the touchscreen covered the entire
width of the virtual screen with two displays. For example, a touch in the
middle of the laptop's touchscreen occurs (from Plasma's point of view) on the
borderline between the two displays, i.e., in the middle of the entire large
virtual screen.

EXPECTED RESULT
Touches should be interpreted only within the touchscreen that generates them;
a  single touchscreen's control input should never be stretched to cover an
entire virtual screen.

SOFTWARE/OS VERSIONS
Linux: 4.19.9 (ArchLinux)
KDE Plasma Version: 5.14.4
KDE Frameworks Version: 5.53.0
Qt Version: 5.12.0

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