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Paul Davis 2013-04-01 11:44:17 -04:00
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_manual/03_setting-up-your-system/08_platform-specifics/01_ubuntu-linux.html
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@ -63,10 +63,7 @@ title: Ubuntu Linux
</dd> </dd>
</dl> </dl>
<h3>Problems with the interaction between PulseAudio and JACK</h3>
<h3>Problems with PulseAudio and JACK Configuration</h3>
<h4>Problems with the interaction between PulseAudio and JACK</h4>
<dl> <dl>
<dt>Background Info</dt> <dt>Background Info</dt>
@ -136,8 +133,11 @@ title: Ubuntu Linux
</dd> </dd>
</dl> </dl>
<h2>Problems with JACK configuration<h2> <h3>Problems with JACK configuration<h3>
<dl class="faq">
<dt>What is the problem?</dt>
<dd>
<p> <p>
To function as intended, JACK needs to run with access to two To function as intended, JACK needs to run with access to two
operating system facilities called "realtime scheduling" and "memory operating system facilities called "realtime scheduling" and "memory
@ -147,18 +147,21 @@ title: Ubuntu Linux
users into this group by default. Consequently, you will not have users into this group by default. Consequently, you will not have
permission to run JACK in the way you should. permission to run JACK in the way you should.
</p> </p>
</dd>
<h5>Symptoms</h5> <dt>Symptoms</dt>
<dd>
<p> <p>
A message like "Cannot lock down memory" in the output from JACK as A message like "Cannot lock down memory" in the output from JACK as
it starts up. This output may be "hidden" in the Messages window of it starts up. This output may be "hidden" in the Messages window of
QJackctrl (aka JACK Control), so you should check there. QJackctrl (aka JACK Control), so you should check there.
</p> </p>
</dd>
<h5>How to fix</h5> <dt>How to fix</dt>
<dd>
<p> <p>
Run the command <code>sudo usermod -a -G Run the command <code>sudo usermod -a -G
audio <em>YOUR-LOGIN-NAME</em></code>. Then logout and login again. audio <em>YOUR-LOGIN-NAME</em></code>. Then logout and login again.
</p> </p>
</dd>
</dl>