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<p style="margin:0px">I just installed Ubuntu trusty (on crouton on an Acer Chromebook), and am trying to get sound going (so I can run Super-Collider.)</p><p style="margin:0px">Upon the advice of various webpages I've come across that discuss installation of Super-Collider, I've tried:</p><p style="margin:0px"></p><ul><li>removing pulseaudio<br></li><li>adding myself to the "hwaudio" group<br></li><li>adding '@audio' entries to /etc/security/limits.conf<br></li></ul><p></p><p style="margin:0px">But I always get "Could not connect to JACK server as client" when I run qjackctl.</p>
<p style="margin:0px"><br></p><p style="margin:0px">This is the output I get when I run qjackctl. I've tried changing the interface to both 'cras' and 'hw:DAISY12S', but neither work.</p><p style="margin:0px"><br></p><p style="margin:0px"><span style="color:rgb(153,153,153)">23:54:23.518 Patchbay deactivated.</span><br></p>
<p style="margin:0px"><span style="color:rgb(153,153,153)">23:54:23.585 Statistics reset.</span></p>
<p style="margin:0px"><span style="color:rgb(204,204,153)">23:54:23.598 ALSA connection change.</span></p>
<p style="margin:0px"><span style="color:rgb(153,153,153)">23:54:23.643 D-BUS: Service not available (org.jackaudio.service aka jackdbus).</span></p>
<p style="margin:0px"><span style="color:rgb(153,153,153)">23:54:23.667 JACK is starting...</span></p>
<p style="margin:0px"><span style="color:rgb(153,0,153)">23:54:23.668 /usr/bin/jackd -dalsa -dcras -r44100 -p1024 -n2</span></p>
<p style="margin:0px"><span style="color:rgb(102,204,153)">23:54:23.686 ALSA connection graph change.</span></p>
<p style="margin:0px">jackd 0.122.0</p>
<p style="margin:0px">Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.</p>
<p style="margin:0px">jackd comes with ABSOLUTELY NO WARRANTY</p>
<p style="margin:0px">This is free software, and you are welcome to redistribute it</p>
<p style="margin:0px">under certain conditions; see the file COPYING for details</p>
<p style="margin:0px">JACK compiled with System V SHM support.</p>
<p style="margin:0px">loading driver ..</p>
<p style="margin:0px">apparent rate = 44100</p>
<p style="margin:0px">creating alsa driver ... cras|cras|1024|2|44100|0|0|nomon|swmeter|-|32bit</p>
<p style="margin:0px">Couldn't connect to cras.</p>
<p style="margin:0px">control open "cras" (Operation not permitted)</p>
<p style="margin:0px">configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods</p>
<p style="margin:0px">ALSA: final selected sample format for capture: 32bit integer little-endian</p>
<p style="margin:0px">ALSA: use 2 periods for capture</p>
<p style="margin:0px">ALSA: cannot set hardware parameters for capture</p>
<p style="margin:0px">ALSA: cannot configure capture channel</p>
<p style="margin:0px">cannot load driver module alsa</p>
<p style="margin:0px">(qjackctl:13298): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed</p>
<p style="margin:0px">(qjackctl:13298): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed</p>
<p style="margin:0px"><span style="color:rgb(153,153,153)">23:54:23.980 JACK was started with PID=13310.</span></p>
<p style="margin:0px"><span style="color:rgb(153,153,153)">23:54:24.042 JACK was stopped successfully.</span></p><p style="margin:0px"><span style="color:rgb(153,153,153)"><br></span></p><p style="margin:0px;text-indent:0px">My apologies if I'm asking this in the wrong place, or if I'm not giving enough info. I'll ask elsewhere if that's more appropriate. But any advice or suggestions would be much appreciated!</p></div>