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List:       kde-bugs-dist
Subject:    [kwin] [Bug 393695] New: High sensitivity mouse settings can cause single click actions to trigger m
From:       <bugzilla_noreply () kde ! org>
Date:       2018-04-30 18:50:46
Message-ID: bug-393695-17878 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=393695

            Bug ID: 393695
           Summary: High sensitivity mouse settings can cause single click
                    actions to trigger menu items in error
           Product: kwin
           Version: 5.12.4
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: libinput
          Assignee: kwin-bugs-null@kde.org
          Reporter: ideomotion@protonmail.com
  Target Milestone: ---

How to reproduce

Increase mouse sensitivity or dpi to high (I use 3000dpi on a 12000dpi mouse).
Focus desktop.
Start a downward-rightward motion with your mouse.  As you make this motion, do
a single right click without holding down, as you continue the
downward-rightward motion.
It will activate one of the menu items as though you held down the button.

This is not exclusive to the right button.  It also happens with the left
button on menus instead of context menus.  This happens in both Fedora 28 KDE
Spin and Kubuntu 18.04 but does not happen in Windows 10 or Gnome 3.  It
happens with either Oxygen and Breeze widgets and also GTK applications.

A left or right un-held click to display a menu should never trigger a menu
item.

Others in the #kde channel on freenode confirmed this behavior.  It is easy to
reproduce with my instructions.  Both of my mice are new (Logitech g900 and
g502).


Why has this bug not been apparent up until now?

High resolution displays (4K on up) lead users to use higher dpi/sensitivity
settings on their mice, especially with premium gaming mice. This is a minority
use case that will increasingly become common as 4k takes over.

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