I realize there are many threads about not being able to start jackd, but none of the solutions provided have been able to cure my issue.
pi@raspberrypi / $ jackd -v -d alsa jackdmp 1.9.9 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2012 Grame. jackdmp comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK server starting in realtime mode with priority 10 Cannot lock down 82278944 byte memory area (Cannot allocate memory) Jack: JackPosixThread::StartImp : create non RT thread Jack: JackPosixThread::ThreadHandler : start Jack: JackDriver::Open capture_driver_name = hw:0 Jack: JackDriver::Open playback_driver_name = hw:0 Jack: Check protocol client = 8 server = 8 Jack: JackEngine::ClientInternalOpen: name = system Jack: JackEngine::AllocateRefNum ref = 0 Jack: JackPosixSemaphore::Allocate name = jack_sem.1000_default_system val = 0 Jack: JackEngine::NotifyAddClient: name = system Jack: JackGraphManager::SetBufferSize size = 1024 Jack: JackConnectionManager::DirectConnect first: ref1 = 0 ref2 = 0 Jack: JackGraphManager::ConnectRefNum cur_index = 0 ref1 = 0 ref2 = 0 Jack: JackDriver::SetupDriverSync driver sem in flush mode control device hw:0 control device hw:0 Failed to connect to session bus for device reservation Unable to autolaunch a dbus-daemon without a $DISPLAY for X11 Failed to acquire device name : Audio0 error : Invalid argument Audio device hw:0 cannot be acquired... Jack: ~JackDriver Cannot initialize driver Jack: no message buffer overruns Jack: JackPosixThread::Stop Jack: JackPosixThread::ThreadHandler : exit JackServer::Open failed with -1 Jack: Succeeded in unlocking 82278944 byte memory area Jack: JackShmMem::delete size = 0 index = 0 Jack: ~JackDriver Jack: Succeeded in unlocking 1040 byte memory area Jack: JackShmMem::delete size = 0 index = 1 Jack: Cleaning up shared memory Jack: Cleaning up files Jack: Unregistering server `default' Failed to open server
That's the output after a fresh reboot, running as root. Any suggestions are greatly appreciated.