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[Launchpad Bug Tracker <1410582@xxxxxxxxxxxxxxxxxx>]

** Branch linked: lp:~bregma/unity/lp-1410582-trusty

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https://bugs.launchpad.net/bugs/1410582

Title:
  [Trusty / Unity] Desktop got unlocked on its own.

Status in Unity:
  Fix Released
Status in Unity 7.2 series:
  In Progress
Status in unity package in Ubuntu:
  Fix Released

Bug description:
  I have a user reporting an incidence that trusty unity desktop got
  unlocked on its own:

  "In the morning, after coming to my desk, I just pressed the space bar
  on my desktop to get the monitors woken up. The monitors came up with
  the locked screen and then after a while it got unlocked to my
  surprise!"

     There was compiz crash file on his system at that time. However, I
  don't have the right debug symbols to which file (or function) it
  crashed into. Here is the top part of the stack trace when I ran
  apport-retrace -s  on his crash file:

  ---------------------------------------------------------------------------------------------------------------
  --- stack trace ---
  #0  0x00007ff17ed06608 in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
  No symbol table info available.
  #1  0x00007ff17ed06cf3 in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
  No symbol table info available.
  #2  0x00007ff17ed04e2d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
  No symbol table info available.
  #3  0x00007ff17f3fdd02 in g_settings_backend_read (backend=<optimized out>, key=key@entry=0xab011c0 "/org/gnome/desktop/lockdown/disable-lock-screen", expected_type=0x7ff1877135a0 <g_variant_type_info_basic_chars>, default_value=default_value@entry=0) at /build/buildd/glib2.0-2.40.2/./gio/gsettingsbackend.c:701
          value = <optimized out>
  #4  0x00007ff17f401c7b in g_settings_read_from_backend (settings=settings@entry=0x7ff13800a570, key=key@entry=0x7fffdde9c920, user_value_only=user_value_only@entry=0, default_value=default_value@entry=0) at /build/buildd/glib2.0-2.40.2/./gio/gsettings.c:1052
          value = <optimized out>
          fixup = <optimized out>
          path = 0xab011c0 "/org/gnome/desktop/lockdown/disable-lock-screen"
  #5  0x00007ff17f402e7a in g_settings_get_value (settings=0x7ff13800a570, key=0x2087618 "disable-lock-screen") at /build/buildd/glib2.0-2.40.2/./gio/gsettings.c:1092
          skey = {schema = 0x7ff13c017a80, name = 0x4b2fa7c "disable-lock-screen", is_flags = 0, is_enum = 0, strinfo = 0x0, strinfo_length = 0, unparsed = 0x0, lc_char = 0 '\000', type = 0x7ff1877135a0 <g_variant_type_info_basic_chars>, minimum = 0x0, maximum = 0x0, default_value = 0xb9c5b30, ref_count = 0}
          value = <optimized out>
          __FUNCTION__ = "g_settings_get_value"
  -----------------------------------------------------------------------------------------------------------------

     The top part of the trash file when viewed in TextEdit has the information :
  -------------------------------------------------
  ProblemType: Crash
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: Unity
  Date: Fri Dec 12 10:16:52 2014
  DistroRelease: Ubuntu 14.04
  ExecutablePath: /usr/bin/compiz
  ExecutableTimestamp: 1405349348
  ProcCmdline: compiz
  --------------------------------------------------

     His system is Ubuntu trusty 14.04.1 LTS. Unity installed
  7.2.3+14.04.20140826-0ubuntu1.0.1 .

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