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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

** Tags added: egl-platform-mir

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https://bugs.launchpad.net/bugs/1281938

Title:
  Mir shows an old frame on client startup (for Mesa GL clients)

Status in Mir:
  Fix Released
Status in mesa package in Ubuntu:
  Triaged
Status in mir package in Ubuntu:
  Fix Released

Bug description:
  Mir shows an old frame on client startup.

  Test case (1):
    1. Start and stop one client at a time:
       bin/mir_demo_client_egltriangle -s 500x500
       bin/mir_demo_client_eglflash -s 500x500
       ...
  Expected: Each client only shows its own frames
  Observed: The first frame of each client seems to be the last frame of the _previous_ client.

  Test case(2) - more definitive but requires hacking:
    1. Insert a long sleep in your client code just before eglSwapBuffers
  Expected: The Mir server never shows the client till after the sleep has finished.
  Observed: The Mir server composites the client immediately on startup, with old/invalid pixel data. It only gets replaced with a valid frame after the sleep finishes.

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