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[xiaoyiwu <xiaoyiwu@xxxxxxxxxxxxxxx>]

(gdb) bt
#0  0x00000000007c8030 in ?? ()
#1  0x00007ffff652c073 in gdk_event_apply_filters (filters=0x8dcf80, 
    event=<optimized out>, xevent=<optimized out>)
    at /build/buildd/gtk+2.0-2.24.25/gdk/x11/gdkevents-x11.c:356
#2  gdk_event_translate (display=0x669020, event=0x8c9c80, 
    xevent=0x7fffffffdc20, return_exposes=9324560, return_exposes@entry=0)
    at /build/buildd/gtk+2.0-2.24.25/gdk/x11/gdkevents-x11.c:1052
#3  0x00007ffff652d696 in _gdk_events_queue (display=display@entry=0x669020)
    at /build/buildd/gtk+2.0-2.24.25/gdk/x11/gdkevents-x11.c:2336
#4  0x00007ffff652d73e in gdk_event_dispatch (source=<optimized out>, 
    callback=<optimized out>, user_data=<optimized out>)
    at /build/buildd/gtk+2.0-2.24.25/gdk/x11/gdkevents-x11.c:2397
#5  0x00007ffff507ec5d in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ffff507ef48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007ffff507f272 in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007ffff68b8747 in IA__gtk_main ()
    at /build/buildd/gtk+2.0-2.24.25/gtk/gtkmain.c:1271

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https://bugs.launchpad.net/bugs/1351890

Title:
  Changing external screen resolution with dual monitors

Status in GTK+:
  Fix Released
Status in ubuntu-mate:
  Fix Released
Status in gtk+2.0 package in Ubuntu:
  Fix Released
Status in mate-control-center package in Ubuntu:
  Fix Released
Status in gtk+2.0 source package in Precise:
  Fix Committed
Status in gtk+2.0 source package in Trusty:
  In Progress
Status in gtk+2.0 package in Debian:
  Fix Released

Bug description:

  [Impact]

  Due to a bug in GTK+2, mate-display-properties crashes when the screen
  resolution is changed *outside* of it (e.g. by changing the resolution
  not via that app, but somewhere else).

  The attached patches fix the issue in GTK+2 and prevent crashing of
  m-d-p.

  Since this issue caused much inconvenience for users, the fix should
  be backported to all current stable releases of Ubuntu.

  [Test Case]

  The easiest way to reproduce it is via Virtualbox:

  1. Run mate-display-properties in the VM.
  2. Make the VM go full-screen.
  3. See m-d-p crash.

  [Regression Potential]

  After several months of testing the patched version of GTK+2 in Debian Jessie, I found no regressions.
  I consider the regression risk very low here.

  There were originally some bugs with a few applications (notably
  Spotify) crashing. We think we've backported patches to fix that -
  some refcounting issues - but please check a few apps to see they
  still work.

  [ Original report ]

  Changing extrnal screen resolution with dual mon

  ProblemType: Crash
  DistroRelease: Ubuntu 14.10
  Package: mate-control-center 1.8.1+dfsg1-4
  ProcVersionSignature: Ubuntu 3.16.0-6.11-generic 3.16.0-rc7
  Uname: Linux 3.16.0-6-generic i686
  ApportVersion: 2.14.5-0ubuntu3
  Architecture: i386
  CrashCounter: 1
  Date: Sun Aug  3 07:09:21 2014
  ExecutablePath: /usr/bin/mate-display-properties
  InstallationDate: Installed on 2014-08-03 (0 days ago)
  InstallationMedia: Ubuntu MATE 14.10 "Utopic Unicorn" - Alpha i386 (20140731)
  ProcCmdline: mate-display-properties
  SegvAnalysis: Skipped: missing required field "Disassembly"
  Signal: 11
  SourcePackage: mate-control-center
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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