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Thread: Kernel > 3.0 and M-Audio Fast Track Ultra problems with EHCI

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    Join Date
    Mar 2011

    Kernel > 3.0 and M-Audio Fast Track Ultra problems with EHCI

    I've got problem with M-Audio Fast Track Ultra support in my ubuntu studio 11.04.

    Can start my soundcard only in high-latency mode (>40ms) and even in this mode I have XRUNs. Doesn't matter whether kernel is Low-latency or not.

    This is my results:

    This problem occurres in all kernels. Everything works COOL only when I turn off EHCI in BIOS and HCI works in OHCI mode.

    I've found out that not my soundcard fails, but EHCI kernel driver.
    When I try to initialize JACK with settings BUFFER SIZE=128 and FREQUENCY=48000 I've got in dmesg:
    [    1.884040] usb 6-2: new low speed USB device number 2 using ohci_hcd
    [    2.336038] usb 6-3: new low speed USB device number 3 using ohci_hcd
    [ 1810.546888] ehci_hcd 0000:00:12.2: force halt; handshake ffffc9000031e024 00004000 00000000 -> -110
    [ 1810.546894] ehci_hcd 0000:00:12.2: HC died; cleaning up
    so you can see that EHCI USB driver dies. Other USB devices continue to work, but if you disconnect them and replug again they won't initialize.

    in JACK message console:
    jackdmp 1.9.7
     Copyright 2001-2005 Paul Davis and others.
     Copyright 2004-2010 Grame.
     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
     JACK server starting in realtime mode with priority 89
     control device hw:5
     control device hw:5
     Acquire audio card Audio5
     creating alsa driver ... hw:5|hw:5|128|2|48000|0|0|nomon|swmeter|-|32bit
     control device hw:5
     Using ALSA driver USB-Audio running on card 5 - M-Audio Fast Track Ultra at usb-0000:00:12.2-6, high speed
     ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to capture-only mode
     Cannot initialize driver
     JackServer::Open() failed with -1
     Failed to start server
    I don't want to wait until EHCI kernel driver is fixed and maybe problem is not straightly connected with it. Does anybody know what's the problem?

    Googling gave me nothing about it, cause there too few M-Audio Fast Track Ultra users in linux community
    Last edited by nullakilla; November 5th, 2011 at 10:56 AM.

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