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<body class="article">
<div id="header">
<h1>Psensor Frequently Asked Questions</h1>
<div id="toc">
  <div id="toctitle">Table of Contents</div>
  <noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph"><p>The last version of this FAQ is available at <a href="http://wpitchoune.net/gitweb/?p=psensor.git;a=blob_plain;f=doc/faq.html;hb=HEAD">http://wpitchoune.net/gitweb/?p=psensor.git;a=blob_plain;f=doc/faq.html;hb=HEAD</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_NoSensors">1. No sensors or only cpu usage is displayed</h2>
<div class="sectionbody">
<div class="paragraph"><p>Psensor is relying on few libraries or softwares for retrieving the
information about the computer:</p></div>
<div class="ulist"><ul>
<li>
<p>
motherboard and CPUs sensors: the information is retrieved
          from the lm-sensors library, it requires that
          <code>sensors-detect</code> has been run and the kernel module
          correctly installed. <code>sensors</code> can be used for checking.
</p>
</li>
<li>
<p>
GPUs: it depends on which driver you are using:
</p>
<div class="ulist"><ul>
<li>
<p>
Opensource drivers (nouveau for Nvidia GPUs or
                  radeon/ati for ATI GPUs) is used and support sensor
                  monitoring for your GPU, the information is using
                  lm-sensors, same steps than above.
</p>
</li>
<li>
<p>
proprietary driver Nvidia: run <code>nvidia-settings</code> to
                  check that it supports sensors monitoring.
</p>
</li>
<li>
<p>
proprietary driver Catalyst/fglx: use <code>aticonfig</code> to
                  check that it supports sensors monitoring. Important
                  note: it requires that you are using a Psensor
                  binary compiled with the ATI support.
</p>
</li>
</ul></div>
</li>
</ul></div>
<div class="paragraph"><p>For hard disk drives, psensor can use:</p></div>
<div class="ulist"><ul>
<li>
<p>
udisks2: added since 1.1.2 release. It is the default and
      recommended provider.
</p>
</li>
<li>
<p>
hddtemp: verify that it is correctly reporting temperature by
      using the command: <code>sudo hddtemp /dev/sda</code>. It is the default
      provider until 1.1.2 release.
</p>
</li>
<li>
<p>
atasmart library: before the 1.1.2 release it can be enabled
      by using the command line option <code>--use-libatasmart</code>.
</p>
</li>
</ul></div>
<div class="paragraph"><p>If the underlying software is reporting sensors which are not
displayed by Psensor, it is probably a bug in Psensor, so please
report it. Otherwise, the issue is on the underlying software itself
and you should contact the corresponding development team or refer to
its documentation.</p></div>
<div class="paragraph"><p>Since the release 1.1.2, the providers can be enabled or disabled directly
from the user interface (<code>Preferences&gt;Provider</code>).</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_ATIMonitoring">2. How to monitor an ATI card using the Catalyst driver?</h2>
<div class="sectionbody">
<div class="paragraph"><p>For monitoring ATI card using the proprietary Catalyst driver, Psensor
must be compiled with a proprietary library which is not packaged in
any Linux distribution.</p></div>
<div class="paragraph"><p>Unfortunely, due to the license of this library, I cannot provide a
compiled version of Psensor, even in a Ubuntu PPA or Ubuntu/Debian
standard repositories. You have to compile Psensor sensor. You can
find the instructions in the section <code>ATI/AMD GPU Support</code> of the
README file available in the Psensor source archives.</p></div>
<div class="paragraph"><p>If you are using the ATI OpenSource driver, it is not needed to
compile Psensor with this proprietary library.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_WrongTemperature">3. The reported temperature is obviously wrong</h2>
<div class="sectionbody">
<div class="paragraph"><p>If the reported temperature is obviously wrong (never change, lower
than the ambiant temperature, negative, higher than the sun
temperature, etc):</p></div>
<div class="ulist"><ul>
<li>
<p>
most of the time it is not a bug in Psensor nor in the
          underlying monitoring libraries:
</p>
<div class="ulist"><ul>
<li>
<p>
if the temperature does not change, it might be due
                  to an existent sensor not wired by the hardware
                  manufacturer.
</p>
</li>
<li>
<p>
the goal of the sensor is to allow the system to
                  detect critical temperature and NOT to report an
                  exact temperature. Most sensors report a relative
                  temperature. The more it differs from the critical
                  temperature , the more it is wrong.
</p>
</li>
</ul></div>
</li>
<li>
<p>
It is only a bug in Psensor if the underlying libraries
          report a different information than Psensor (use the
          appropriate command or software: <code>sensors</code>, <code>aticonfig</code> or
          <code>hddtemp</code> to check). In this case, please report a bug.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="S_WhatIsTheSensor">4. What is the sensors XXXX?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Since Psensor v0.7.0.4, open the preferences of the sensor (click on
its name in the main window and select the menu item Preferences), and
look at the Chip field.</p></div>
<div class="paragraph"><p>For older Psensor releases, look at the Id field, if the string is
starting with:</p></div>
<div class="ulist"><ul>
<li>
<p>
<code>lmsensor coretemp</code>: Intel CPU.
</p>
</li>
<li>
<p>
<code>lmsensor k10temp</code>, <code>lmsensor k8temp</code>, <code>lmsensor fam15h_power</code>: AMD CPU.
</p>
</li>
<li>
<p>
<code>nvidia</code> or <code>lmsensor nouveau</code>: NVIDIA GPU.
</p>
</li>
<li>
<p>
<code>hdd</code>: hard disk drive.
</p>
</li>
<li>
<p>
<code>amd</code>: AMD GPU.
</p>
</li>
<li>
<p>
<code>lmsensor C B</code>: C is the name of the chip, B the name of the adapter.
</p>
</li>
</ul></div>
<div class="paragraph"><p>For more information about lmsensor devices, see
<a href="http://lm-sensors.org/wiki/Devices">http://lm-sensors.org/wiki/Devices</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_BugReport">5. How to report a bug?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Please use <a href="https://bugs.launchpad.net/psensor/+filebug">https://bugs.launchpad.net/psensor/+filebug</a> to report bugs
even if it can only reproduced with a non-Ubuntu distribution or a
release not available in the standard Ubuntu repositories.</p></div>
<div class="paragraph"><p>You can also use
<a href="https://bugs.launchpad.net/ubuntu/+source/psensor/+filebug">https://bugs.launchpad.net/ubuntu/+source/psensor/+filebug</a> if the bug
can be reproduced with a package from the standard Ubuntu
repositories.</p></div>
<div class="paragraph"><p>If you don’t want to use the launchpad, you can send the report by
email to:</p></div>
<div class="ulist"><ul>
<li>
<p>
<a href="mailto:psensor-users@googlegroups.com">psensor-users@googlegroups.com</a>
</p>
</li>
<li>
<p>
or <a href="mailto:jeanfi@gmail.com">jeanfi@gmail.com</a>.
</p>
</li>
</ul></div>
<div class="paragraph"><p>If the bug is concerning Debian or Ubuntu derivatives distribution,
please add in its description the output of the command: <code>apt-cache
policy psensor</code>.</p></div>
<div class="paragraph"><p>If it is related to the Psensor source compilation, please add the
full output of the <code>configure</code> command.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_SubmitIdea">6. How to send ideas, questions or comments?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Check the FAQ or the TODO pages.</p></div>
<div class="paragraph"><p>If you don’t find the information, you can send an email to the public
mailing-list <a href="mailto:psensor-users@googlegroups.com">psensor-users@googlegroups.com</a> or directly to me:
<a href="mailto:jeanfi@gmail.com">jeanfi@gmail.com</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_Contribute">7. How to contribute?</h2>
<div class="sectionbody">
<div class="paragraph"><p>See <a href="http://wpitchoune.net/blog/psensor/how-to-contribute/">http://wpitchoune.net/blog/psensor/how-to-contribute/</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_UbuntuInstall">8. How to install Psensor on Ubuntu?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Psensor is in the official repository, search <code>psensor</code> in the
software center and install it. More information at:
<a href="http://wpitchoune.net/blog/psensor/ubuntu-integration/">http://wpitchoune.net/blog/psensor/ubuntu-integration/</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_DebianInstall">9. How to install Psensor on Debian?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Psensor is in the official repository since Debian 7.0. You can get
the last packaged version from the sid repository. More information
at: <a href="http://packages.qa.debian.org/p/psensor.html">http://packages.qa.debian.org/p/psensor.html</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_PPA">10. What is the difference between the 3 Ubuntu PPAs?</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
<code>ppa:jfi/ppa</code>: last stable version.
</p>
</li>
<li>
<p>
<code>ppa:jfi/psensor-unstable</code>: last development version, no
          major bug is expected.
</p>
</li>
<li>
<p>
<code>ppa:jfi/psensor-daily-trunk</code>: build each day directly from
          the GIT source repository. It may contain major bugs or
          incomplete features. Useful for contributors or testing
          whether a bug is fixed.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="S_ArchLinuxInstall">11. How to install Psensor on ArchLinux?</h2>
<div class="sectionbody">
<div class="paragraph"><p>See <a href="http://aur.archlinux.org/packages.php?ID=37807">http://aur.archlinux.org/packages.php?ID=37807</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_OtherInstall">12. How to install Psensor on my Linux distribution?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Psensor packages are available in the standard repositories of Ubuntu
(since Oneiric) and Debian (since v7) distributions.</p></div>
<div class="paragraph"><p>For other distributions, you will find the compilation and
installation instructions in the section <code>Installation from source
archive</code> in the README file of the source archive. Psensor should
compile in any modern distribution.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_LOG">13. How to log sensors temperatures?</h2>
<div class="sectionbody">
<div class="paragraph"><p>The best way is probably to use sensord or a custom script based on
the output of the different commands like <code>sensors</code>.</p></div>
<div class="paragraph"><p>Anyway, as I received several requests about such feature, since the
0.7.0.4 release it is implemented in both psensor ( menu preferences &gt;
sensors &gt; enable log of measures) and psensor-server
(<code>--sensor-log-file</code> option).</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_NO_GRAPH_DISPLAYED">14. No graphs are displayed, but the table of the main window is displaying sensors</h2>
<div class="sectionbody">
<div class="paragraph"><p>In the sensors table of the main window, switch on the checkbox of the last
column (named <code>Enabled</code> or <code>Graph</code> depending on the Psensor version).</p></div>
</div>
</div>
<div class="sect1">
<h2 id="S_autostart">15. Launch Psensor automaticaly on session startup</h2>
<div class="sectionbody">
<div class="paragraph"><p>Since the version 1.0.1, Psensor is no more started automaticaly by default.</p></div>
<div class="paragraph"><p>Open the <code>Preferences</code> window, select the <code>Startup</code> tab and switch on
the option <code>Launch on session startup</code>.</p></div>
<div class="paragraph"><p>This feature is requiring that the Desktop Environment supports the
<a href="http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html">XDG
specification</a>.</p></div>
<div class="paragraph" id="S_disk"><p>How to monitor the temperature of a disk with <code>hddtemp</code>?</p></div>
<div class="listingblock">
<div class="content">
<pre><code>Until the release 1.1.2, Psensor is using +hddtemp+ by default to
retrieve the temperature of the disks.

If +hddtemp+ is installed but no disk temperature is reported, check
that the daemon is running by using for example the command +ps
-eaf|grep hddtemp+.
It should output something like:</code></pre>
</div></div>
<div class="paragraph"><p>root      1433     1  0 May28 ?        00:00:21 /usr/sbin/hddtemp -d -l 127.0.0.1 -p 7634 -s | /dev/sdb</p></div>
<div class="listingblock">
<div class="content">
<pre><code>Depending on the Linux distribution, the installation of the +hddtemp+
package does not enable the hddtemp daemon automaticaly.

In this case, edit the file +/etc/default/hddtemp+ and set
+RUN_DAEMON+ to +"true"+ like in the following example:</code></pre>
</div></div>
<div class="paragraph"><p># hddtemp network daemon switch. If set to true, hddtemp will listen
# for incoming connections.
RUN_DAEMON="true"</p></div>
<div class="listingblock">
<div class="content">
<pre><code>For Debian/Ubuntu, you can use</code></pre>
</div></div>
<div class="paragraph"><p>dpkg-reconfigure hddtemp</p></div>
<div class="listingblock">
<div class="content">
<pre><code>and reply +yes+ when asked whether hddtemp daemon must be
run during the startup.

[[S_SimilarSoft]]
Is there any other similar softwares?</code></pre>
</div></div>
<div class="paragraph"><p>Here is a list of few well-known sensors monitoring softwares:</p></div>
<div class="ulist"><ul>
<li>
<p>
for X11: <a href="http://freecode.com/projects/xsensors">http://freecode.com/projects/xsensors</a>
</p>
</li>
<li>
<p>
for GNOME2: <a href="http://sensors-applet.sourceforge.net/">http://sensors-applet.sourceforge.net/</a>
</p>
</li>
<li>
<p>
for Ubuntu Unity: <a href="https://launchpad.net/indicator-sensors">https://launchpad.net/indicator-sensors</a>
</p>
</li>
<li>
<p>
more general, but can be configured to display sensors
          information: <a href="http://conky.sourceforge.net/">http://conky.sourceforge.net/</a>
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="S_HideSensor">16. Is it possible to hide sensors in the main window?</h2>
<div class="sectionbody">
<div class="paragraph"><p>Before v1.1.1, the sensors retrieved from the lm-sensor library can be
ignored directly in the lm-sensor configuration. See the manpage
of sensors.conf(5).</p></div>
<div class="paragraph"><p>Since v1.1.1, it is possible to hide a sensor, uncheck the setting
<em>Display sensor in the list of sensors</em> in the sensor preferences.</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated 2014-09-20 09:13:33 CEST
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