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[Bug 1475120] Re: [regression] Clients are blocked in swap buffers when the screen turns off

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Date: Mon, 24 Aug 2015 06:57:43 -0000
Reply-to: Bug 1475120 <1475120@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: mir
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1475120

Title:
  [regression] Clients are blocked in swap buffers when the screen turns
  off

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

Bug description:
  [regression] Clients are blocked in swap buffers when the screen turns
  off. This came about since dynamic double buffering was introduced in
  r2763.

  With triple buffers, the screen turning off just makes clients slow
  down to 10Hz. However since r2763, well performing clients that are
  given double buffers will be blocked when the screen turns off.

  IMHO, the 10Hz behaviour is a mistake for Ubuntu's power management.
  It's a historical kludge we implemented to support buggy apps, but
  it's still a supported feature and so should continue to work.

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