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crasher with stock USB audio driver
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crasher with stock USB audio driver


  • Subject: crasher with stock USB audio driver
  • From: david tay <email@hidden>
  • Date: Fri, 17 Jun 2005 17:00:04 -0700

Hi,

I've been working with a class compliant USB audio device and whenever attempting to play sounds, I get a Kernel panic with the following bt. The device enumerates and shows up as USB audio class compliant. I'm suspecting that it crashes soon after AppleUSBAudioEngine::sampleRateHandler is called.

Could a problem during the initialization phase (ie - when the driver matches and loads up) cause the crash?


#0 0x2e08865c in ?? ()
#1 0x2e08b164 in ?? ()
warning: Previous frame identical to this frame (corrupt stack?)
#2 0x2e08b164 in ?? ()
#3 0x2e08a1f4 in ?? ()
#4 0x2e0870f8 in ?? ()
#5 0x004f370c in IOAudioEngine::startAudioEngine ()
#6 0x004f28f8 in IOAudioEngine::incrementActiveUserClients ()
#7 0x004f27ec in IOAudioEngine::startClient ()
#8 0x004f81d4 in IOAudioEngineUserClient::startClient ()
#9 0x004f8084 in IOAudioEngineUserClient::startClientAction ()
#10 0x00268684 in IOCommandGate::runAction (this=0x271bb00, inAction=0x4f8040 <IOAudioEngineUserClient::startClientAction (OSObject*, void*, void*, void*, void*)>, arg0=0x0, arg1=0x0, arg2=0x0, arg3=0x0) at /SourceCache/xnu/xnu-517.12.7/iokit/Kernel/ IOCommandGate.cpp:98
#11 0x002809d4 in is_io_connect_method_scalarI_scalarO (connect=0x2001800, index=3758097090, input=0x26e8b38, inputCount=0, output=0x269de38, outputCount=0x269de34) at /SourceCache/xnu/ xnu-517.12.7/iokit/Kernel/IOUserClient.cpp:2113
#12 0x0007b09c in _Xio_connect_method_scalarI_scalarO (InHeadP=0x26e8b10, OutHeadP=0x269de10) at device/device_server.c:4250



Thanks,

David
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