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[Alexander Vinbæk Strand <1528011@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1522727 ***
    https://bugs.launchpad.net/bugs/1522727


** Attachment added: "xorg-log"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1528011/+attachment/4544428/+files/xorg-log

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https://bugs.launchpad.net/bugs/1528011

Title:
  Apparently random crash out of desktop to login screen

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  I've seen a few reports, but more "hey, anyone...?" versus filing a
  bug, so I thought I'd do the latter. Delete if a duplicate.

  New upgrade of Xubuntu from 15.04 to 15.10 on an MSI-based series 9
  motherboard with Intel graphics (i3-4130). You can just be toddling
  along and BANG, you're back at the login prompt and all applications
  are closed - with obvious loss of data.

  
  uname -a:

  Linux Castor 4.2.0-22-generic #27-Ubuntu SMP Thu Dec 17 22:57:08 UTC
  2015 x86_64 x86_64 x86_64 GNU/Linux

  
  I'm just looking at installing the Intel graphics drivers to see if that helps... there's nothing obvious in most log files, but syslog contains these lines:

  Dec 20 13:02:58 Castor whoopsie[678]: [13:02:58] Parsing /var/crash/_usr_bin_Xorg.0.crash.
  Dec 20 13:02:58 Castor whoopsie[678]: [13:02:58] Uploading /var/crash/_usr_bin_Xorg.0.crash.
  Dec 20 13:02:59 Castor whoopsie[678]: [13:02:59] Sent; server replied with: No error
  Dec 20 13:02:59 Castor whoopsie[678]: [13:02:59] Response code: 200
  Dec 20 13:02:59 Castor whoopsie[678]: [13:02:59] Reported OOPS ID fe3e7276-a719-11e5-ad2f-fa163e4aaad4
  Dec 20 13:03:05 Castor org.gnome.keyring.SystemPrompter[4761]: Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
  Dec 20 13:04:36 Castor systemd[1]: Stopping User Manager for UID 112...
  Dec 20 13:04:36 Castor systemd[4594]: Stopped target Default.
  Dec 20 13:04:36 Castor systemd[4594]: Stopped target Basic System.
  Dec 20 13:04:36 Castor systemd[4594]: Stopped target Sockets.
  Dec 20 13:04:36 Castor systemd[4594]: Reached target Shutdown.
  Dec 20 13:04:36 Castor systemd[4594]: Stopped target Timers.
  Dec 20 13:04:36 Castor systemd[4594]: Stopped target Paths.
  Dec 20 13:04:36 Castor systemd[4594]: Starting Exit the Session...
  Dec 20 13:04:36 Castor systemd[4594]: Received SIGRTMIN+24 from PID 5794 (kill).
  Dec 20 13:04:36 Castor systemd[1]: Stopped User Manager for UID 112.
  Dec 20 13:04:36 Castor systemd[1]: Removed slice user-112.slice.

  ... with ~/.xsession-errors:

  upstart: upstart-event-bridge main process ended, respawning
  upstart: upstart-event-bridge main process (4822) terminated with status 1
  upstart: upstart-event-bridge main process ended, respawning
  upstart: upstart-event-bridge main process (4823) terminated with status 1
  upstart: upstart-event-bridge respawning too fast, stopped

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
  Uname: Linux 4.2.0-22-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  Date: Sun Dec 20 14:24:52 2015
  InstallationDate: Installed on 2014-12-07 (378 days ago)
  InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140723)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: xorg
  UpgradeStatus: Upgraded to wily on 2015-12-19 (0 days ago)

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