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[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

** Also affects: mesa (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1641017

Title:
  Mesa 12.0.5 - multiple important fixes, stable branch

Status in mesa package in Ubuntu:
  Fix Released
Status in mesa source package in Xenial:
  New
Status in mesa source package in Yakkety:
  Confirmed

Bug description:
  [Impact]
  Mesa 12.0.5 is now available as a point release in the stable branch. Mesa has MRE for these.

  The release contains multiple fixes amongst which:
  The nouveau vdpau driver performance has been restored. The wayland-egl
  module no longer crashes if the user calls eglDestroySurface and
  wl_egl_window_destroy in the "wrong" order. libEGL correctly advertises
  the EGL platforms available. Multiple fd leaks were addressed, which
  could prevent rmmod of devices such as the DisplayLink drivers. Radeonsi
  has gained noticeable performance by disabling ReZ. Interop between third
  party OpenCL implementations and mesa's libGL/libEGL is back online...
  and many more.

  Full changelog:
  https://lists.freedesktop.org/archives/mesa-dev/2016-November/135027.html

  I am particularly interested in the RadeonSI performance boost:
  https://lists.freedesktop.org/archives/mesa-dev/2016-October/131759.html
  In real-world tests the boost is about 20% (Yay!) :
  http://www.phoronix.com/scan.php?page=news_item&px=Mesa-Post-ReZ-Change-Benchmarks

  [Test case]
  Run the default desktop and maybe a game or two.

  This release has been tested on xenial by the certification team on a set of machines, covering:
  Intel Haswell
  Intel Broadwell
  Intel Skylake
  AMD Mobility Radeon HD 5430/5450/5470

  and they all passed the tests.

  Once this is in -proposed, the community will be asked to test it on a
  wider range of devices.

  [Regression potential]
  yakkety: the release consists of cherry-picks from master, specifically selected as bugfixes. Regression potential should be low.

  xenial: it's a bigger bump for xenial, but since yakkety already ships
  with this series the risk should be low

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