Amethyst: Multi-display with focus follows mouse causes active window stuttering

[snoonan]

Two displays, one is larger. Displays are not mirrored.
The larger is a desktop monitor plugged in to a laptop with the smaller builtin display, display plugged in before wakeup or after.

When focus follows mouse, there are some points on the small screen (most of the upper half) that cause the active window to stutter between the window under the cursor and the window at the same point on the larger display. The stutter is rapid (~10/second) and happens when the mouse is moved but not when it is stationary. This means that focus follows mouse is unusable in this configuration.

Trello Card

[ianyh]

I think this is a duplicate of #543

[jakecoppinger]

I'm not sure that this is a duplicate. My focus-follows-mouse is working flawlessly with the exception of this bug.
My setup is 1080p monitor situated above MacBook monitor. If the mouse pointer moves in the bottom 100 pixels or so of the external monitor there is a rapid cycle of focus switching between the window on one monitor and the window on the other.

macOS 10.12.5, Amethyst 0.11.4

[ianyh]

Okay. Thanks for the report!

[jakecoppinger]

Some more interesting behaviour!

if top monitor has dock:
    moving mouse in top ~100 pixels of bottom display flickers focus between monitors
if bottom monitor has dock:
    moving mouse in bottom ~100 pixels of top display flickers focus between monitors

That being said, loving Amethyst so much I just don't work in the problematic areas at the moment.

[ianyh]

I think this should be fixed by #745