<ul>
<li>a bug in PulseAudio that causes it not to give up the
soundcard when JACK asks (<a href="https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1163638">LP: #1163638</a></li>
- <li>bad package dependency information that causes a critical
- package to be missing even when JACK and PulseAudio are
- installed</li>
- <li>a bug that causes JACK to freeze up when told to stop,
- causing issues with restarting</li>
+ <li>a bug that causes jackdbus v.1.9.8 (jackd does not suffer from this) to freeze up when told to stop,
+ causing issues with restarting (<a href="https://bugs.launchpad.net/ubuntu/precise/+source/jackd2/+bug/956438">LP: #956438</a></li>
</ul>
</dd>
<dt>Symptoms</dt>
<ul>
<li>Cannot start JACK (though see the next section for other
causes of this)</li>
- <li>JACK starts but there is no sound coming from Ardour or other
- applications that use JACK.</li>
</ul>
</p>
</dd>
<dt>How to fix</dt>
<dd>
<p>
+ Make sure the file /etc/security/limits.d/audio.conf exists. If it is
+ named /etc/security/limits.d/audio.conf.disabled, rename it to the former.
Run the command <code>sudo usermod -a -G
audio <em>YOUR-LOGIN-NAME</em></code>. Then logout and login again.
+ On Ubuntu Studio the user is a member of audio group by default, but not
+ on other flavors. Read more about why <a href="https://wiki.ubuntu.com/Audio/TheAudioGroup">here</a>
</p>
</dd>
</dl>