[Bug 1675888] Re: various applets occasionally crash on transparent panel

[Simon Quigley]

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https://bugs.launchpad.net/bugs/1675888

Title:
  various applets occasionally crash on transparent panel

Status in mate-panel package in Ubuntu:
  Fix Released
Status in mate-panel source package in Zesty:
  Triaged

Bug description:
  [Impact]

  Almost all panel applets occasionally crash if the panel is transparent.
  Usually it happens on session start. It affects all panels that are on the
  screen, e.g. if you have top and bottom panels, then the applets from both
  panels would crash.

  The patch attached to this report fixes the issue.

  The fix is already present in Artful and tested by developers and users.
  Would be nice to backport it to Zesty as well, as it's really a major
  inconvenience for users who prefer to have a transparent panel.

  [Test Case]

  If you see the applets crashes on session start, then the issue is already
  reproduced. Otherwise you can try moving transparency slider in the panel
  properties very fast back and forth - after some tries it will cause some
  applets to crash. It's been confirmed that it's the same crash as happens
  on session start, with the same backtrace and the same root cause.

  [Regression Potential]

  None. All that's done is to replace the direct call of cairo function with
  the call to GDK's cairo support function. It proved to be the proper way to
  do it.

  [Other Info]

  The patch is included into the debdiff attached to this report.

  The debdiff contains patches to fix bug 1675888, bug 1676840, bug 1690517,
  bug 1695648. See other reports for the corresponding SRU templates.

  Note that the debdiff attached to bug 1690517 is a separate one for
  Artful.

  [Original Description]

  crash on testing shortcuts: Ctrl+ Alt +Numpad

  ProblemType: Crash
  DistroRelease: Ubuntu 17.04
  Package: mate-panel 1.18.0-0ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-13.15-generic 4.10.1
  Uname: Linux 4.10.0-13-generic x86_64
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Fri Mar 24 20:13:18 2017
  ExecutablePath: /usr/lib/mate-panel/notification-area-applet
  InstallationDate: Installed on 2016-06-28 (268 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcCmdline: /usr/lib/mate-panel/notification-area-applet
  ProcEnviron:
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
   PATH=(custom, no user)
   LANGUAGE=ro_RO
   LANG=ro_RO.UTF-8
  Signal: 5
  SourcePackage: mate-panel
  StacktraceTop:
   ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   XGetGeometry () from /usr/lib/x86_64-linux-gnu/libX11.so.6
   mate_panel_applet_get_background () from /usr/lib/x86_64-linux-gnu/libmate-panel-applet-4.so.1
  Title: notification-area-applet crashed with signal 5 in _XReply()
  UpgradeStatus: Upgraded to zesty on 2017-03-17 (6 days ago)
  UserGroups: adm audio cdrom dialout dip fax floppy lpadmin netdev plugdev sambashare scanner sudo tape vboxusers video

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