Regression: moving windows between workspaces through screen edge fails randomly

Submitted by tmp..@..pan.pl

Assigned to Olivier Fourdan @olivier

Link to original bug (#11658)

Description

In 4.12.0 dragging windows between workspaces through screen edges fails randomly (read: almost never works). The window remains on the current workspace in most cases and it seems there is no obvious rule which governs the behaviour.

Moving window manually by the Workspace switcher applet, dragging it's taskbar button to a workspace on the Workspace switcher, or using context menu's "Move to another workspace" works flawlessly.

Changing edge resistance to extremely low value seems to help with the following results (values are given in slider ticks from the begining of the scale in window manager settings editor): 0-1: works well 2: works well, sometimes fails 3: fails in ~40% of attempts 4: fails in >50% of attempts 20: fails nearly always 30+: never succeeded... And "30" is far from the slider's maximum...

Seems like regression since 4.10.1.