[LAU] jackd2 resume from suspend hangs

[Peter P.]

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
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