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Bug 780250 - Mouse pointer does not follow touch input under Wayland
Mouse pointer does not follow touch input under Wayland
Product: mutter
Classification: Core
Component: wayland
Other Linux
: Normal normal
: ---
Assigned To: mutter-maint
Depends on:
Reported: 2017-03-18 21:01 UTC by Strangiato
Modified: 2017-09-20 03:36 UTC
See Also:
GNOME target: ---
GNOME version: ---

Description Strangiato 2017-03-18 21:01:24 UTC
I use a laptop with Synaptic touchscreen (Lenovo G400S Touch), I'm running Gnome 3.24 RC on Arch.

1. Use your mouse/touchpad to move the mouse pointer to any place on your screen
2. Touch your screen (the pointer disappears)

The mouse pointer becomes visible again when the mouse/touchpad is used, but the pointer movement starts from the initial screen position (first step) instead from the touch input position.

This happens only under Wayland session.
Comment 1 Strangiato 2017-08-27 15:29:15 UTC
Same bahavior on 3.26 beta 2.
Comment 2 Jonas Ådahl 2017-09-20 03:36:11 UTC
This is by design. We don't treat touch screens as a absolute pointing device, but as a real touch screen, wich multi touch and all other things that comes with it. Wayland clients will also not see mouse clicks on touches, as was done previously on plain X11. This is also by design; we want applications to be able to actually use touch screens for what they are, which wouldn't be possible if we started using them to emulate mice.