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[Bug 1380278] Re: unity-settings-daemon crashed with SIGSEGV in _gdk_device_xi2_reset_scroll_valuators()

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Tim <tim@xxxxxxxxxxxxxx>
Date: Tue, 14 Oct 2014 07:19:05 -0000
Reply-to: Bug 1380278 <1380278@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

I haven't been able to reproduce this here yet,, but I do maybe have an
idea for a fix. Is anyone affected by this able to check (using gdb) the
value of 'device->scroll_valuators' in frame #0. Hopefully it is NULL?

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https://bugs.launchpad.net/bugs/1380278

Title:
  unity-settings-daemon crashed with SIGSEGV in
  _gdk_device_xi2_reset_scroll_valuators()

Status in “unity-settings-daemon” package in Ubuntu:
  Confirmed

Bug description:
  I don't know

  ProblemType: Crash
  DistroRelease: Ubuntu 14.10
  Package: unity-settings-daemon 14.04.0+14.10.20141010-0ubuntu1
  ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4
  Uname: Linux 3.16.0-22-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Oct 12 16:07:07 2014
  ExecutablePath: /usr/lib/unity-settings-daemon/unity-settings-daemon
  InstallationDate: Installed on 2014-09-21 (21 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140921)
  ProcCmdline: /usr/lib/unity-settings-daemon/unity-settings-daemon
  SegvAnalysis:
   Segfault happened at: 0x7f4aed57b3a4:	mov    0x8(%rax),%edx
   PC (0x7f4aed57b3a4) ok
   source "0x8(%rax)" (0x00000008) not located in a known VMA region (needed readable region)!
   destination "%edx" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: unity-settings-daemon
  StacktraceTop:
   ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
   gdk_display_get_event () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
  Title: unity-settings-daemon crashed with SIGSEGV in gdk_display_get_event()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo

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