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[Launchpad Bug Tracker <1439427@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package unity-settings-daemon -
15.04.1+16.04.20160701-0ubuntu1

---------------
unity-settings-daemon (15.04.1+16.04.20160701-0ubuntu1) xenial; urgency=medium

  [ Robert Ancell ]
  * Correctly check value of XDG_CURRENT_DESKTOP.

  [ Marco Trevisan (Treviño) ]
  * PowerManager: connect to keyboard BrightnessChanged signal to update
    the cached current value properly (LP: #1510344)
  * GsdPowerManager: don't cache kbd backlight current value (LP:
    #1583861)
  * common: backport g-s-d commits for having single shared dbus proxies
  * ScreensaverProxy: redirect supported calls to gnome screensaver APIs
    (LP: #1415265, LP: #1584161)

  [ Sebastien Bacher ]
  * Don't hit an xerror when a device is removed while being configured
    (LP: #1503758)
  * wacom: don't segfault when a device is removed while being
    configured. (LP: #1439427)

  [ Marco Trevisan (Treviño) ]
  * GsdPowerManager: use proper return value for upower_kbd_toggle
    wherever we use it (LP: #1592816)

  [ Kai-Heng Feng ]
  * SettingsManager: Queue up signals before getting D-Bus connection.
    (LP: #1571640)

 -- Marco Trevisan (Treviño) <mail@xxxxxxxxx>  Fri, 01 Jul 2016 13:28:54
+0000

** Changed in: unity-settings-daemon (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1439427

Title:
  unity-settings-daemon crashed with SIGSEGV in XGetDeviceProperty()
  [after laptop is un-docked]

Status in Unity Settings Daemon:
  Fix Released
Status in unity-settings-daemon package in Ubuntu:
  Fix Released
Status in unity-settings-daemon source package in Xenial:
  Fix Released

Bug description:
  This used to happen under 14.10 too. When I undock my laptop (Lenovo
  X230T) from its dock (external monitor, wired network, etc) and then
  put it to sleep, when it wakes up I get this error and no keyboard
  shortcuts work, e.g. all my custom ones, Ctrl-Alt-T, etc.

  Also, this time, maybe or not related, the wifi network stopped
  working (saw no networks). I killed NetworkManager. It didn't relaunch
  automatically. I restarted it, and then the network was fine.

  My keyboard shortcuts return when I log out and back in.

  ProblemType: Crash
  DistroRelease: Ubuntu 15.04
  Package: unity-settings-daemon 15.04.1+15.04.20150324.1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  Uname: Linux 3.19.0-10-generic x86_64
  ApportVersion: 2.17-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Apr  1 17:57:17 2015
  EcryptfsInUse: Yes
  ExecutablePath: /usr/lib/unity-settings-daemon/unity-settings-daemon
  InstallationDate: Installed on 2015-03-28 (4 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150325)
  ProcCmdline: /usr/lib/unity-settings-daemon/unity-settings-daemon
  SegvAnalysis:
   Segfault happened at: 0x7fc0fcd9d3bc <XGetDeviceProperty+124>:	mov    (%r15),%rdx
   PC (0x7fc0fcd9d3bc) ok
   source "(%r15)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%rdx" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: unity-settings-daemon
  StacktraceTop:
   XGetDeviceProperty () from /usr/lib/x86_64-linux-gnu/libXi.so.6
   device_set_property () from /usr/lib/unity-settings-daemon-1.0/libgsdwacom.so
   ?? () from /usr/lib/unity-settings-daemon-1.0/libgsdwacom.so
   ?? () from /usr/lib/unity-settings-daemon-1.0/libgsdwacom.so
   ?? () from /usr/lib/unity-settings-daemon-1.0/libgsdwacom.so
  Title: unity-settings-daemon crashed with SIGSEGV in XGetDeviceProperty()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip fuse lpadmin plugdev sambashare sudo

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