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[Launchpad Bug Tracker <1698233@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package libepoxy - 1.3.1-1ubuntu0.16.04.2

---------------
libepoxy (1.3.1-1ubuntu0.16.04.2) xenial; urgency=medium

  * Disable patch 8d58c890646fc1f43bcab702bb9ed6bae94daefe:
    - this patch is causing some troubles on proprietary drivers.
      LP: #1698233

 -- Gianfranco Costamagna <locutusofborg@xxxxxxxxxx>  Sat, 24 Jun 2017
00:02:18 +0200

** Changed in: libepoxy (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1698233

Title:
  [SRU] New libepoxy0 causes hang at boot for AMDGPU-PRO

Status in libepoxy package in Ubuntu:
  Fix Released
Status in libepoxy source package in Xenial:
  Fix Released
Status in libepoxy source package in Zesty:
  Fix Released

Bug description:
  [Impact] 
  * Updating libepoxy with the updates pocket (xenial) and the -proposed pocket (zesty) breaks systems with AMDGPU-PRO proprietary drivers

  [Test Case]
  * Have that driver/card

  [Regression Potential] 
  * None, I'm disabling a patch that I introduced in the last SRU.
  * Debian opened an RC bug and will fix the same in the next point release,
  and I'm discussing with upstream to revert that patch (they should have already reverted it)
  * I just updated it to artful and Debian will follow in a few hours I guess

  [Other info]

  When updating my Xubuntu 16.04.2 system today the upgrade from
  libepoxy0 1.3.1-1 to libepoxy0 1.3.1-1ubuntu0.16.04.1 caused my system
  to hang right before the login screen.

  Unfortunately since this was a complete system lock up I can't provide
  any logs as I had to restore the entire root partition from backup.
  Since I can't get system recovery mode to work (it's been broken for a
  few years and times out within two minutes) it doesn't give me enough
  time gather any logs before it exits. I understand the system recovery
  problem is known, but I've tried all the solutions I could over the
  years, on multiple systems, and just can't get it to work without
  timing out anymore.

  In any case I verified the problem was libepoxy0 by applying all the
  available updates except libexpoxy0 and rebooting without any
  problems. I then allowed the upgrade of libepoxy0, libepoxy0:i386, and
  libeepoxy-dev and the system hung at boot as previously described. I
  went through the same procedure twice to confirm.

  I'm running kernel 4.9.31-040931-lowlatency with AMDGPU-PRO 16.50
  patched drivers, with all system updates. If you need more information
  please contact me and I'll get you anything I can. But as I said,
  since the system locks up I'm not sure what else I can garner.

  lsb_release -rd:
  Description:	Ubuntu 16.04.2 LTS
  Release:	16.04

  apt-cache policy libepoxy0:
  libepoxy0:
    Installed: 1.3.1-1
    Candidate: 1.3.1-1ubuntu0.16.04.1
    Version table:
       1.3.1-1ubuntu0.16.04.1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
   *** 1.3.1-1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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