[Bug 1350808] Re: update-manager unexpectedly restarts system

[Per Ångström]

Yesterday, I lost about an hour's work because of this behavior. I had
been editing an audio file in Audacity, and I was going to save it. When
Audacity's save-confirmation dialog appeared, I pressed Enter, not
seeing that the small Restart dialog had also appeared in the corner of
the screen and grabbed keyboard focus. Instead of saving my work, the
computer immediately shut down and restarted. After the restart, all my
work was lost.

$ lsb_release -rd
Description:	Ubuntu 14.04.1 LTS
Release:	14.04

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Title:
  update-manager unexpectedly restarts system

Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  When update-manager is finished updating, it pops up a dialog "System
  needs restarting. [Restart Now], [Restart Later], [Cancel]".
  Unfortunately, the default button is "Restart Now" is the default
  button. If the popup occurs in the middle of some other work, this
  popup grabs the focus, and takes an [Enter], that was meant for some
  other window, as a selection of "Restart Now" and reboots the system
  without further confirmation. The whole session is killed without a
  chance to save current work.

  Expected behaviour: either have "Restart Later" as default action, or
  (better): no default action at all (no reaction on keyboard events),
  but only on real mouse clicks.

  $ lsb_release -rd
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  $ apt-cache policy update-manager
  update-manager:
    Installiert:           1:0.196.12
    Installationskandidat: 1:0.196.12
    Versionstabelle:
   *** 1:0.196.12 0
          500 http://de.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.196.11 0
          500 http://de.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: update-manager 1:0.196.12
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Thu Jul 31 13:12:03 2014
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'835'
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'window-width' b'646'
   b'com.ubuntu.update-manager' b'launch-time' b'1406804350'
  InstallationDate: Installed on 2013-08-22 (342 days ago)
  InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to trusty on 2014-05-19 (72 days ago)

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