[LAU] ffado and jack keep freezing - I need your help

Hi, everyone.I'm here to get some troubleshooting from you. I installed ffado and jack on Archlinux, but I can't get it working properly. About my system: - Thinkpad x201i(Intel i3-380m and 8G memory) - Echo Audiofire2 (connected via expresscard) - Archlinux 64bit - 2.6.39 kernel (BFS patched) - installed libffado 2.0.1-3 (svn version from aur) and jack 1.9.5-1 - configured to the advice from the script realtimeconfigquickscan(except the realtime kernel and 1000hz clock part) - running rtirq daemon. configured as below.... RTIRQ_NAME_LIST="rtc firewire_ohci ehci_hcd:usb1 ehci_hcd:usb2 i8042" RTIRQ_NON_THREADED="rtc" Symtoms: - ffado and jack work for some time(about 30 seconds?) then freeze. detailed process... Arch starts turn qjackctl on start other audio apps (tested with hydrogen and qsynth) Seems working well After some time, all sounds stop and transport doesn't roll When I close other apps and press stop button on qjackctl, it displays 'stopping...' and nothing more. here's jacks messages after the stop button pressed. 00:45:53.378 JACK is stopping... Jack: JackClient::Deactivate Jack: fPollTable i = 1 fd = 51 Jack: fPollTable i = 2 fd = 52 Jack: JackRequest::DeactivateClient Jack: JackEngine::ClientDeactivate ref = 2 name = qjackctl Jack: JackServer::Deactivate client = 2 was not activated Jack: JackServer::Deactivate client = 2 was not activated Jack: JackProcessSync::TimedWait time out = 53320 JackProcessSync::LockedTimedWait error usec = 53320 err = Connection timed out Jack: JackProcessSync::TimedWait finished delta = 53442.0 JackEngine::ClientDeactivate wait error ref = 2 name = qjackctl Jack: JackClient::Deactivate res = 4294967295 Jack: jack_client_close Jack: JackClient::Close ref = 2 Jack: JackClient::Deactivate Jack: JackSocketClientChannel::Stop Jack: JackPosixThread::Kill Jack: fPollTable i = 1 fd = 51 Jack: fPollTable i = 2 fd = 52 Jack: JackRequest::ClientClose Jack: JackEngine::ClientCloseAux ref = 2 Jack: JackGraphManager::RemoveAllPorts ref = 2 Jack: JackProcessSync::TimedWait time out = 10664 JackProcessSync::LockedTimedWait error usec = 10664 err = Connection timed out Jack: JackProcessSync::TimedWait finished delta = 10825.0 JackEngine::ClientCloseAux wait error ref = 2 Jack: JackPosixSemaphore::Destroy Jack: JackSocketNotifyChannel::Close Jack: JackClientSocket::Close Jack: JackShmMem::delete size = 0 index = 2 Jack: JackSocketServerChannel::ClientRemove ref = 2 Jack: JackClientSocket::Close Jack: JackSocketServerChannel::BuildPoolTable size = 2 Jack: fSocketTable i = 1 fd = 51 Jack: JackClientSocket::Close Jack: JackClientSocket::Close Jack: JackPosixSemaphore::Disconnect jack_sem.1000_default_qjackctl Jack: JackLibClient::~JackLibClient Jack: JackShmReadWritePtr1::~JackShmReadWritePtr1 2 Jack: Succeeded in unlocking 384 byte memory area Jack: JackLibGlobals Destroy 1982be0 Jack: ~JackLibGlobals Jack: JackPosixSemaphore::Disconnect jack_sem.1000_default_system Jack: JackPosixSemaphore::Disconnect jack_sem.1000_default_freewheel Jack: no message buffer overruns Jack: JackPosixThread::Stop Jack: ThreadHandler: exit Jack: JackShmReadWritePtr::~JackShmReadWritePtr 1 Jack: Succeeded in unlocking 1040 byte memory area Jack: JackShmReadWritePtr::~JackShmReadWritePtr 0 Jack: Succeeded in unlocking 47647264 byte memory area Jack: jack_client_close res = 0 jack main caught signal 15 Jack: JackServer::Stop Jack: JackThreadedDriver::Stop Jack: JackPosixThread::Stop Jack: JackServer::Close Jack: JackPosixThread::Stop Jack: fPollTable i = 1 fd = 51 Jack: JackRequest::Notification Jack: JackRequest::Notification kQUIT Jack: JackMachServerChannel::Execute JackQuitException Jack: ThreadHandler: exit Jack: JackServerSocket::Close /dev/shm/jack_default_1000_0 Jack: JackClientSocket::Close Jack: JackFFADODriver::Detach ... and no more. it just holds here. - But ffado and jack work just nicely not freezing in extremely rare cases (with no xruns) I wanted to check messages from ffado too, but I don't know how. Can anyone give me a likely solution to this problem? Or any more information needed? Thanks in advance!