[Pkg-xfce-devel] Bug#611326: xfce4: Panel's taskbar goes into infinite loop

Edmund Eyles edmund_eyles at hotmail.com
Fri Jan 28 03:39:54 UTC 2011

Package: xfce4
Severity: important

I am intermittently getting this problem: when I start an application, the
taskbar (i.e. the part of the panel where icons are placed for running
applications) starts expanding and contracting at a very high rate.  It is
then impossible to see exactly what is in the taskbar and to interact with it.
At the same time CPU usage by the xfce4-panel process goes up to 50% and
higher, and remains there.

This can happen anything from once a week to several times a day.  It does not
seem to be triggered by starting a particular application - it can be anything
(e.g. Terminal, Icedove).  Once it was triggered when a Python script I was
running itself went into an infinite loop.  It does seem to be related to a
highish system load, but this is not at all consistent - it can happen when
the load is low, and it does not always happen when the load is high.

Sometimes this behaviour can be stopped by closing the application that
appeared to trigger it, sometimes not.  Sometimes closing other applications
will help, sometimes not.  Sometimes it stops of its own accord after a few
minutes, sometimes not.  When all else fails, the only way to stop it is to
end my X session.

In short, this is a serious usability issue with little rhyme or reason to it.  I would be happy to investigate further if given some pointers as to what to
look for.

-- System Information:
Debian Release: 5.0.8
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-bpo.5-686 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages xfce4 depends on:
ii  gtk2-engines-xfce       2.6.0-2~bpo50+1  A GTK+-2.0 theme engine for Xfce
ii  orage                   4.6.1-1~bpo50+1  Calendar for Xfce Desktop Environm
ii  thunar                  1.0.2-1~bpo50+1  File Manager for Xfce
ii  thunar-volman           0.3.80-2~bpo50+1 Thunar extension for volumes manag
ii  xfce4-appfinder         4.6.2-1~bpo50+1  Application finder for the Xfce4 D
ii  xfce4-mixer             4.6.1-2~bpo50+1  Xfce mixer application
ii  xfce4-panel             4.6.4-1~bpo50+1  The Xfce4 desktop environment pane
ii  xfce4-session           4.6.2-3~bpo50+1  Xfce4 Session Manager
ii  xfce4-settings          4.6.5-2~bpo50+1  graphical application for managing
ii  xfce4-utils             4.6.2-1~bpo50+1  Various tools for Xfce
ii  xfconf                  4.6.2-1~bpo50+1  utilities for managing settings in
ii  xfdesktop4              4.6.2-1~bpo50+1  xfce desktop background, icons and
ii  xfwm4                   4.6.2-1~bpo50+1  window manager of the Xfce project

Versions of packages xfce4 recommends:
ii  desktop-base             5.0.3           common files for the Debian Deskto
ii  tango-icon-theme         0.8.1-4         Tango Icon theme
ii  xfprint4                 4.6.1-1~bpo50+1 Printer GUI for Xfce4
ii  xorg                     1:7.3+20        X.Org X Window System

xfce4 suggests no packages.

-- no debconf information

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