Dear list, having just switched from jackd1 to jackd2 I notice that jackd hangs when issuing a "systemctl suspend" and resuming from that suspend with a USB Edirol UA-25 card. I am including relevant error messages below. Thank you for any pointers! Peter I run from the shell as follows jackd -v -t2000 -dalsa -r44100 -p512 -n2 -Xseq -D -Chw:UA25 -Phw:UA25 -i2 -o2 and clients can connect and play through it fine. When I issue the suspend and resume, jackd has printed the following: status error: No such device ALSA: channel flush for playback failed (No such device) JackAudioDriver::ProcessAsync: read error, stopping... Jack: JackPosixThread::ThreadHandler : exit When I try to connect with a client (mplayer) to it, mplayer hangs and eventually exits posting Cannot read socket fd = 7 err = Success CheckRes error JackSocketClientChannel read fail Cannot open MPlayer [109458] client JackShmReadWritePtr1::~JackShmReadWritePtr1 - Init not done for -1, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock [JACK] cannot open server Failed to initialize audio driver 'jack' [...] Exiting... (End of file) and during this connection attempt jackd has printed Jack: JackSocketServerChannel::ClientCreate socket Jack: JackSocketServerChannel::BuildPoolTable size = 3 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 2 fd = 13 Jack: JackSocketServerChannel::Execute : poll client error err = Broken pipe Jack: JackSocketServerChannel::ClientKill ref = -1 fd = 13 Jack: Client was not opened : probably correspond to server_check Jack: JackClientSocket::Close Jack: JackSocketServerChannel::BuildPoolTable size = 2 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::ClientCreate socket Jack: JackSocketServerChannel::BuildPoolTable size = 3 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 2 fd = 13 Jack: JackRequest::ClientCheck Jack: Check protocol client = 8 server = 8 Jack: JackRequest::ClientOpen Jack: JackEngine::ClientExternalOpen: uuid = 12, name = MPlayer [110502] Jack: JackEngine::AllocateRefNum ref = 2 Jack: JackLinuxFutex::Allocate name = jack_sem.1000_default_MPlayer [110502] val = 0 Jack: JackSocketNotifyChannel::Open name = MPlayer [110502] Jack: JackClientSocket::Connect : addr.sun_path /dev/shm/jack_MPlayer [110502]_1000_0 Jack: JackShmMem::new index = 2 attached = ef29b000 size = 426 Jack: JackExternalClient::Open name = MPlayer [110502] index = 2 base = ef29b000 Jack: JackPosixProcessSync::TimedWait time out = 5000000 [...] JackPosixProcessSync::LockedTimedWait error usec = 5000000 err = Connection timed out Jack: JackPosixProcessSync::TimedWait finished delta = 5000156.0 Driver is not running Jack: JackExternalClient::Close Jack: JackSocketNotifyChannel::Close Jack: JackClientSocket::Close Jack: JackShmMem::delete size = 0 index = 2 Cannot create new client Jack: JackSocketServerChannel::Execute : poll client error err = Broken pipe Jack: JackSocketServerChannel::ClientKill ref = -1 fd = 13 Jack: Client was not opened : probably correspond to server_check Jack: JackClientSocket::Close Jack: JackSocketServerChannel::BuildPoolTable size = 2 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::ClientCreate socket Jack: JackSocketServerChannel::BuildPoolTable size = 3 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 2 fd = 13 Jack: JackSocketServerChannel::Execute : poll client error err = Broken pipe Jack: JackSocketServerChannel::ClientKill ref = -1 fd = 13 Jack: Client was not opened : probably correspond to server_check Jack: JackClientSocket::Close Jack: JackSocketServerChannel::BuildPoolTable size = 2 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::ClientCreate socket Jack: JackSocketServerChannel::BuildPoolTable size = 3 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 1 fd = 12 Jack: JackSocketServerChannel::BuildPoolTable fSocketTable i = 2 fd = 13 Jack: JackRequest::ClientCheck Jack: Check protocol client = 8 server = 8 Jack: JackRequest::ClientOpen Jack: JackEngine::ClientExternalOpen: uuid = 13, name = alsa-jack.jackP.110502.0 Jack: JackEngine::AllocateRefNum ref = 2 Jack: JackLinuxFutex::Allocate name = jack_sem.1000_default_alsa-jack.jackP.110502.0 val = 0 Jack: JackSocketNotifyChannel::Open name = alsa-jack.jackP.110502.0 Jack: JackClientSocket::Connect : addr.sun_path /dev/shm/jack_alsa-jack.jackP.110502.0_1000_0 Jack: JackShmMem::new index = 2 attached = ef29b000 size = 426 Jack: JackExternalClient::Open name = alsa-jack.jackP.110502.0 index = 2 base = ef29b000 Jack: JackPosixProcessSync::TimedWait time out = 5000000