This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
zesty' to 'verification-done-zesty'. If the problem still exists, change
the tag 'verification-needed-zesty' to 'verification-failed-zesty'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-zesty

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https://bugs.launchpad.net/bugs/1700521

Title:
  powerpc: Invalidate ERAT on powersave wakeup for POWER9

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  == Comment: #0 - Breno Leitao <bren...@br.ibm.com> - 2017-06-23 13:13:02 ==
  Hello,

  This is a patch that we need to have on Zesty, including on the
  16.04.3 installer.

  On POWER9 the ERAT may be incorrect on wakeup from some stop states
  that lose state. This causes random segvs and illegal instructions
  when these stop states are enabled.

  This patch invalidates the ERAT on wakeup on POWER9 to prevent this
  from causing a problem.

  
  URL: https://patchwork.ozlabs.org/patch/780365/

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