Public bug reported:
Environment:
* Ubuntu 26.04
* GNOME 50
* Wayland session
* dual monitor setup
* Wacom tablet/stylus
Description:
I originally reported this issue against Mutter because the behaviour looked
like a core Wayland/window management problem. After further testing, the issue
appears to be specifically related to Ubuntu’s Tiling Assistant extension.
Normal behaviour:
* window dragging works correctly
* windows can be freely positioned
* snapping behaves normally
Problem:
As soon as the Wacom stylus comes close to the tablet surface (proximity
event), window dragging behaviour changes dramatically:
* windows become aggressively snapped/tiled
* especially on the secondary monitor
* windows are strongly attracted toward screen edges
* it becomes difficult or impossible to place windows freely
* windows frequently jump into half-screen tiled states
Important finding:
Disabling the Ubuntu Tiling Assistant extension completely resolves the issue.
With the extension disabled:
* Wacom stylus works normally
* no aggressive snapping occurs
* window dragging behaves correctly on both monitors
Additional notes:
* disabling Mutter edge tiling alone does NOT solve the issue:
gsettings set org.gnome.mutter edge-tiling false
* the issue seems specifically related to the extension’s handling of
pointer/stylus drag events under Wayland
* the issue is reproducible consistently
This suggests the problem is likely inside the extension rather than
Mutter core or the Wacom driver itself.
** Affects: gnome-shell-extension-tiling-assistant (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2152845
Title:
Wacom stylus proximity triggers aggressive snapping only when Ubuntu
Tiling Assistant extension is enabled
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