[plasmashell] [Bug 523892] New: Using the pointing nub always disables touchpad

https://bugs.kde.org/show_bug.cgi?id=523892

            Bug ID: 523892
           Summary: Using the pointing nub always disables touchpad
    Classification: Plasma
           Product: plasmashell
      Version First 6.7.3
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: 1.0

DESCRIPTION

It should be possible to forbid the disabling of touchpad, ever. Even when the
pointing nub is in use.

The Touchpad KCM offers "disable when typing" which you can turn off. But it
doesn't offer turning off "disable when nubbing" which I would very much like
to do. Currently, when I try to use the nub for moving the cursor and the
touchpad to scroll, the desktop ignores my scroll attempts. Similarly, if I
accidentally nudge the nub, I lose the cursor for a short moment.

STEPS TO REPRODUCE
1. Get a laptop with the pointing nub betwen GBH keys
2. Use the nub to move the cursor
3. Immediately try to scroll using a touchpad gesture (or simply switch back to
touchpad for more precise movement)

OBSERVED RESULT

4. Notice that this doesn't work, only after a delay
5. Go to KCM, notice that this turning off can't be turned off

EXPECTED RESULT

The KCM lets me uncheck "disable the touchpad when the nub is used"

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 43
KDE Plasma Version: 6.7.3
KDE Frameworks Version: 6.28.0
Qt Version: 6.10.3
Kernel Version: 7.1.5-100.fc43.x86_64 (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION

I made sure that the events are getting to the kernel by observing touch pad
events running to the /dev/event* touchpad device while it was disabled (Using
evtest.). This means it's filtered out in the user space somewhere.

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