** Description changed:

  GTK apps on Mir: Input focus is unreliable and sporadic. Background
  windows ignore input and/or focus switches apparently randomly.
+ 
+ Example:
+ 
+ $ GDK_BACKEND=mir mir_demo_server --launch gnome-mahjongg
+ 
+ Show the "Scores" - you can switch focus between this and the main
+ window with Alt+` but doesn't respond to input.
+ 
+ Other dialogs (e.g. "About") work fine. From the Mir side there's no
+ obvious difference between these windows.
+ 
+ In this example, MIR_CLIENT_INPUT_RECEIVER_REPORT=log shows the input
+ events being correctly received on the client side. That shows most of
+ the Mir stack is working correctly.

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https://bugs.launchpad.net/bugs/1445543

Title:
  Multi-window GTK apps in Mir are randomly unresponsive, seem to freeze

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