David Runge wrote on 06.05.2019 23:20: > Hi Niklas, > > On 2019-05-06 22:24:33 (+0200), nik@xxxxxxxxxxxxxxx wrote: > > jackd -P98 -dalsa -dhw:2 -p512 -n3 -o2 -r44100 > Add some more verbosity with `-v` > > > ALSA: use 3 periods for capture > > ALSA: final selected sample format for playback: 24bit little-endian in > 3bytes > > format > > ALSA: cannot set channel count to 2 for playback > > ALSA: cannot configure playback channel > > Released audio card Audio2 > > audio_reservation_finish > > Cannot initialize driver > > JackServer::Open failed with -1 > > Failed to open server > And you're sure it is not already running and/or being used by something > else (e.g. pulseaudio)? Hi David, I don't have pulseaudio installed, so I'm pretty sure that can be ruled out. There's no other program running that could block the device, as far as I can see. The only two other things I notices are the strange sample format and the this two messages in dmesg that appear when switching the device on after attaching (not when attaching the already switched-on device) [ 37.512914] usb 1-2: device descriptor read/64, error -71 [ 37.742890] usb 1-2: device descriptor read/64, error -71 -v says: jackdmp 1.9.12 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2016 Grame. Copyright 2016-2017 Filipe Coelho. 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 no message buffer overruns no message buffer overruns no message buffer overruns JACK server starting in realtime mode with priority 98 self-connect-mode is "Don't restrict self connect requests" Jack: JackPosixThread::StartImp : create non RT thread Jack: JackPosixThread::ThreadHandler : start Jack: playback device hw:2 Jack: capture device hw:2 Jack: apparent rate = 44100 Jack: frames per period = 512 Jack: JackDriver::Open capture_driver_name = hw:2 Jack: JackDriver::Open playback_driver_name = hw:2 Jack: Check protocol client = 8 server = 8 Jack: JackEngine::ClientInternalOpen: name = system Jack: JackEngine::AllocateRefNum ref = 0 Jack: JackLinuxFutex::Allocate name = jack_sem.1000_default_system val = 0 Jack: JackEngine::NotifyAddClient: name = system Jack: JackGraphManager::SetBufferSize size = 512 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 audio_reservation_init Acquire audio card Audio2 creating alsa driver ... hw:2|hw:2|512|3|44100|0|2|nomon|swmeter|-|32bit configuring for 44100Hz, period = 512 frames (11.6 ms), buffer = 3 periods ALSA: final selected sample format for capture: 32bit integer little-endian ALSA: use 3 periods for capture ALSA: final selected sample format for playback: 24bit little-endian in 3bytes format ALSA: cannot set channel count to 2 for playback ALSA: cannot configure playback channel Jack: JackDriver::Close Jack: JackConnectionManager::DirectDisconnect last: ref1 = 0 ref2 = 0 Jack: JackGraphManager::DisconnectRefNum cur_index = 0 ref1 = 0 ref2 = 0 Jack: JackEngine::ClientInternalClose ref = 0 Jack: JackEngine::ClientCloseAux ref = 0 Jack: JackGraphManager::RemoveAllPorts ref = 0 Released audio card Audio2 audio_reservation_finish 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 82280346 byte memory area Jack: JackShmMem::delete size = 0 index = 0 Jack: ~JackDriver Jack: Succeeded in unlocking 1187 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 Best, Niklas _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
