fast-user-switch-applet exhibiting high CPU usage

[Szilárd Páll]

Binary package hint: fast-user-switch-applet

The fast-user-switch-applet process started to exhibit high, close to 100% processor usage and restarting the process does not help.

Here are the ps aux outputs after two conswquent times killing the process (automatically restarts)"

pszilard 31255 99.3 0.4 244268 16812 ? S 13:55 25:33 /usr/lib/fast-user-switch-applet/fast-user-switch-applet --oaf-activate-iid=OAFIID:GNOME_FastUserSwitchApplet_Factory --oaf-ior-fd=20
pszilard 31957 95.6 0.3 240088 14392 ? S 14:24 0:09 /usr/lib/fast-user-switch-applet/fast-user-switch-applet --oaf-
activate-iid=OAFIID:GNOME_FastUserSwitchApplet_Factory --oaf-ior-fd=20
pszilard 31967 98.6 0.3 240084 14396 ? R 14:25 0:02 /usr/lib/fast-user-switch-applet/fast-user-switch-applet --oaf-activate-iid=OAFIID:GNOME_FastUserSwitchApplet_Factory --oaf-ior-fd=20

At the same time, in the auth.log some lines seem to be referring to this incident:
May 8 14:20:01 csbl09 CRON[31758]: pam_unix(cron:session): session opened for user root by (uid=0)
May 8 14:20:01 csbl09 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.37" (uid=1001 pid=4427 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.218" (uid=0 pid=31758 comm="/USR/SBIN/CRON "))

uname -a:
Linux csbl09 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux

[Chris Coulson (chrisccoulson)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please try to obtain a backtrace following the instructions at http://wiki.ubuntu.com/DebuggingProgramCrash and upload the backtrace (as an attachment) to the bug report. This will greatly help us in tracking down your problem.

[Raal (raal)]

I have same problem on my Ubuntu 9.04. I'm using freenx and every user connected over network have f-u-s-a running.
Those processes causes high cpu load. I'll attach strace.

#top
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 7827 zdenek 20 0 25988 13m 9.9m S 99.5 2.6 0:08.89 fast-user-switc

#ps aux
zdenek 7827 99.4 2.6 25988 13500 ? R 21:44 3:16 /usr/lib/fast-user-switch-applet/fast-user-switch-applet
--oaf-activate-iid=OAFIID:GNOME_FastUserSwitchApplet_Factory --oaf-ior-fd=20
# uname -a
Linux nx 2.6.28-14-generic #47-Ubuntu SMP Sat Jul 25 00:28:35 UTC 2009 i686 GNU/Linux

[Launchpad Janitor (janitor)]

[Expired for fast-user-switch-applet (Ubuntu) because there has been no activity for 60 days.]