Let me rephrase that...
The problem seems to be that MultiThreadedCompositor (unity-system-compositor)
unconditionally recomposes on restart:
compose_on_start = true;
This means the user is guaranteed to see an old frame on restart because
we've allowed no time for clients (included nested servers) to provide
any new frames.
We should probably just sleep for a second or so in
MultiThreadedCompositor on restart. That will allow clients time to
provide a new frame (as soon as they can). And then only if no clients
have provided a new frame after that delay should
MultiThreadedCompositor force a recompose itself.
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https://bugs.launchpad.net/bugs/1340510
Title:
session screen seen upon quick power key strike
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