panel-6-indicat uses 25% CPU

[Romik Forest]

Ubuntu Studio 16.04 LTS, 4.4.0-22-lowlatency, xfce4 4.12
top always shows 25% cpu used by panel-6-indicat
killing the panel-6-indicat doesn't help

[Romik Forest (forest-software)]

$ top
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 2183 romik 20 0 446808 35028 26832 S 21,3 0,9 2:21.52 panel-6-indicat

$ ps ax | grep panel
 2183 ? Rl 0:43 /usr/lib/x86_64-linux-gnu/xfce4/panel/wrapper-2.0 /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libindicator-plugin.so 6 16777271 indicator Индикаторы Предоставляет место на панели для индикаторов Unity. Индикаторы позволяют приложениям и системным сервисам показывать свой статус и взаимодействовать с пользователем.

$ dpkg -S /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libindicator-plugin.so
xfce4-indicator-plugin: /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libindicator-plugin.so

$ apt-cache show xfce4-indicator-plugin
Package: xfce4-indicator-plugin
Priority: optional
Section: universe/xfce
Installed-Size: 370
Maintainer: Xubuntu Developers <email address hidden>
Original-Maintainer: Debian Xfce Maintainers <email address hidden>
Architecture: amd64
Version: 2.3.3-0ubuntu4
Provides: indicator-renderer
Depends: libc6 (>= 2.4), libdbus-glib-1-2 (>= 0.78), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.37.3), libgtk-3-0 (>= 3.6), libido3-0.1-0 (>= 13.10.0daily13.06.19), libindicator3-7 (>= 0.4.90), libxfce4panel-2.0-4 (>= 4.11.0), libxfce4ui-2-0 (>= 4.11.0), libxfce4util7 (>= 4.9.0), libxfconf-0-2 (>= 4.6.0), upstart
Filename: pool/universe/x/xfce4-indicator-plugin/xfce4-indicator-plugin_2.3.3-0ubuntu4_amd64.deb
Size: 60824
MD5sum: ab1d273990915238c7fca0ea67c074f5
SHA1: ca96db3e21960cf1b36b66a444368e7749c4dc3d
SHA256: 2c1a4193aa68dfce9bcb4f37ea663d245815ee85457d7eb8f2d16fded72e90fa
Description-ru: модуль отображения информации от приложений на панели Xfce4
 Небольшое расширение для последовательного отображения информации от
 различных приложений в панели Xfce4 по правилам описанным в спецификации
 Ubuntu MessagingMenu design.
Description-md5: 9840efa394a05eab71be8c0a6217040f
Homepage: http://goodies.xfce.org/projects/panel-plugins/xfce4-indicator-plugin/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 3y
Task: xubuntu-core, xubuntu-desktop, mythbuntu-frontend, mythbuntu-desktop, mythbuntu-backend-slave, mythbuntu-backend-master, ubuntustudio-desktop-core, ubuntustudio-desktop

P.S. I use xfce4 + compiz

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jakub Vaněk (vanek-jakub4)]

It's the same here on Xubuntu 16.04 (without compositor). I managed to lower the CPU usage by killing indicator-application-service in a loop:

for((;;)) do killall indicator-application-service; done

After a few seconds press Ctrl+C.

This is duplicate of https://bugs.launchpad.net/ubuntu/+source/xfce4-indicator-plugin/+bug/1583164

[TBeholder (turbobeholder)]

If non-essential processes load CPU, you can just drop their priority and let them.
Here's my shell script from the time more XFCE plugins were voracious - save this where you can find it, make sure the file is executable, then add "<your path>/leash_cpuhogs.sh" in Application Autostart tab in Session and Startup - those seem to run after enforced session applications proper, so unless there are more slowing bugs, it will work (otherwise "sleep 10" line at the start should do the trick).
To see what exactly is done just uncomment diagnostics and start it from terminal.

#!/bin/sh
NEWPRIORITY=8
HOGNAMES="libindicator"
# it's a regexp, so add more as "(libindicator|libcpugraph|whatever)"

# ps xao %p%a | grep -iP $HOGNAMES | grep -v "logout" | grep -v "grep"
HOGLIST=`ps xao %p%a | grep -iP $HOGNAMES | grep -v "logout" | grep -v "grep" | grep -o "^\s*[0-9]*"`
echo "$HOGLIST" | while read thisproc
do
# echo deprioritizing $thisproc
 renice -n $NEWPRIORITY -p $thisproc
done