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more ubuntu edits

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Paul Davis 2013-04-01 11:44:17 -04:00
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39
_manual/03_setting-up-your-system/08_platform-specifics/01_ubuntu-linux.html
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@ -9,7 +9,7 @@ title: Ubuntu Linux
Ubuntu Linux is the most popular variety of Linux in use on desktop Ubuntu Linux is the most popular variety of Linux in use on desktop
and laptop systems. It has the backing of a for-profit corporation and laptop systems. It has the backing of a for-profit corporation
(Canonical Inc.) behind it, a defined philosophy and a huge and (Canonical Inc.) behind it, a defined philosophy and a huge and
worldwide user base.As a result, it is a common platform for people worldwide user base. As a result, it is a common platform for people
who want to use Ardour and other tools for music creation and who want to use Ardour and other tools for music creation and
pro-audio work. pro-audio work.
</p> </p>
@ -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>
@ -136,9 +133,12 @@ title: Ubuntu Linux
</dd> </dd>
</dl> </dl>
<h2>Problems with JACK configuration<h2> <h3>Problems with JACK configuration<h3>
<p> <dl class="faq">
<dt>What is the problem?</dt>
<dd>
<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
locking". This means that you, the user who starts JACK, must be locking". This means that you, the user who starts JACK, must be
@ -146,19 +146,22 @@ title: Ubuntu Linux
user group that has this permission but ... it does not put new user group that has this permission but ... it does not put new
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>