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[Launchpad Bug Tracker <1672955@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package mir - 0.26.3+17.10.20170526.3-0ubuntu1

---------------
mir (0.26.3+17.10.20170526.3-0ubuntu1) artful; urgency=medium

  [ Daniel van Vugt ]
  * New upstream release 0.26.3 (https://launchpad.net/mir/+milestone/0.26.3)
    - Enhancements:
      . Make deprecations optional (and default to off for builds on 16.04 LTS)
      . Added support for building on Ubuntu 17.10 artful.
    - Bugs fixed:
      . Mir needs to be updated to 0.26 in 16.04LTS (LP: #1685186)
      . unity-system-compositor crashed with SIGSEGV in
        libinput_device_config_accel_is_available() from
        libinput_device_config_accel_set_speed() from
        mir::input::evdev::LibInputDevice::apply_settings() (LP: #1672955)
      . Please transition to Boost 1.62 (LP: #1675138)
      . Mir sending key repeat events continually to nested shell after VT
        switch (causes Unity8 lockup for a while) (LP: #1675357)
      . mir_demo_standalone_render_overlays fails to link (LP: #1677239)

 -- Alan Griffiths <alan.griffiths@xxxxxxxxxxxxx>  Fri, 26 May 2017
16:57:20 +0000

** Changed in: mir (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1672955

Title:
  unity-system-compositor crashed with SIGSEGV in
  libinput_device_config_accel_is_available() from
  libinput_device_config_accel_set_speed() from
  mir::input::evdev::LibInputDevice::apply_settings()

Status in Canonical System Image:
  Fix Committed
Status in Mir:
  Fix Committed
Status in Mir 0.26 series:
  Fix Committed
Status in Unity System Compositor:
  Invalid
Status in mir package in Ubuntu:
  Fix Released
Status in unity-system-compositor package in Ubuntu:
  Invalid
Status in mir source package in Xenial:
  Fix Committed
Status in unity-system-compositor source package in Xenial:
  Invalid

Bug description:
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unity-system-compositor.  This problem was most recently seen with package version 0.9.1+17.04.20170216-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/fcf5550475fb0478d6eb2a307f03705ef1ed398a contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/. 

  It seems that the configuration change is requested just a moment
  before the device gets removed. The change actions are serialized,
  depending on where there memory of mir::input::DefaultDevice is
  allocated the segfault either occurs inside the lambda or inside
  underlying mir::input::LibInputDevice in the platform. The activities
  on input dispatch device removal and reconfiguration are serialized
  inside the input thread, so we just need to clean the action queue (or
  have multiple queues) before removing the devices.

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