Just to clarify:

Unity8 shows a contextual (app name, icon) and configurable (via
.desktop file atm) splash screen for apps that connect on the default
socket. That splash screen is replaced with the actual surface as soon
as the client *draws* to it.

If, at any point, the contents are black, that means the client has
drawn a black frame.

We may modify how the splash screen behaves, delay it for a very short
time and have a minimum time it has to be on screen, so that there's
never a "flicker".

This way a client that draws or quits (utilities?) very quickly (within
the initial delay) will go straight to the surface. Any, however, that
missed that mark, will appear slower than they are in reality, to avoid
the splash-to-app flicker.

I've filed bug #1670442 for that.

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Touch seeded packages, which is subscribed to unity8 in Ubuntu.
https://bugs.launchpad.net/bugs/1577641

Title:
  Unity8 creates a blank black window for windowless apps

Status in Canonical System Image:
  Won't Fix
Status in Mir:
  Invalid
Status in unity8 package in Ubuntu:
  Won't Fix

Bug description:
  Unity8 creates a blank black window for windowless apps.

  Windowless apps are closer thank you think:   Xmir -rootless
  is one such example while no X apps have started yet.

To manage notifications about this bug go to:
https://bugs.launchpad.net/canonical-devices-system-image/+bug/1577641/+subscriptions

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