ardour/manual
13
0
Fork 0
Code Pull Requests Releases Activity

more ubuntu edits

Browse Source
This commit is contained in:
Paul Davis 2013-04-01 11:44:17 -04:00
parent d86885b948
commit 5f583562d7
1 changed files with 32 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
_manual/03_setting-up-your-system/08_platform-specifics/01_ubuntu-linux.html
View File

@ -9,7 +9,7 @@ title: Ubuntu Linux
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
(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
pro-audio work.
</p>
@ -63,10 +63,7 @@ title: Ubuntu Linux
</dd>
</dl>
<h3>Problems with PulseAudio and JACK Configuration</h3>
<h4>Problems with the interaction between PulseAudio and JACK</h4>
<h3>Problems with the interaction between PulseAudio and JACK</h3>
<dl>
<dt>Background Info</dt>
@ -136,29 +133,35 @@ title: Ubuntu Linux
</dd>
</dl>
<h2>Problems with JACK configuration<h2>
<h3>Problems with JACK configuration<h3>
<p>
To function as intended, JACK needs to run with access to two
operating system facilities called "realtime scheduling" and "memory
locking". This means that you, the user who starts JACK, must be
allowed access to these facilities. By default, Ubuntu does create a
user group that has this permission but ... it does not put new
users into this group by default. Consequently, you will not have
permission to run JACK in the way you should.
</p>
<dl class="faq">
<dt>What is the problem?</dt>
<dd>
<p>
To function as intended, JACK needs to run with access to two
operating system facilities called "realtime scheduling" and "memory
locking". This means that you, the user who starts JACK, must be
allowed access to these facilities. By default, Ubuntu does create a
user group that has this permission but ... it does not put new
users into this group by default. Consequently, you will not have
permission to run JACK in the way you should.
</p>
</dd>
<dt>Symptoms</dt>
<dd>
<p>
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
QJackctrl (aka JACK Control), so you should check there.
</p>
</dd>
<dt>How to fix</dt>
<dd>
<p>
Run the command <code>sudo usermod -a -G
audio <em>YOUR-LOGIN-NAME</em></code>. Then logout and login again.
</p>
</dd>
</dl>
<h5>Symptoms</h5>
<p>
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
QJackctrl (aka JACK Control), so you should check there.
</p>
<h5>How to fix</h5>
<p>
Run the command <code>sudo usermod -a -G
audio <em>YOUR-LOGIN-NAME</em></code>. Then logout and login again.
</p>