I have similar issue qjackctl
pasuspender -- jackd -d alsa -d hw:0 ATTENTION: The playback device "hw:0" is already in use. Please stop the application using it and run JACK again my user is in groups audio, pulse, ... several reboots Hunted down any program that could run audio and kill them still not working This happened after following troubleshooting https://help.ubuntu.com/community/SoundTroubleshootingProcedure alsa info sh http://alsa-project.org/db/?f=9a8410ea124a25e1830f39bca4fbd4c363a701ca -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1147405 Title: JACK won't start To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qjackctl/+bug/1147405/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs