Re: [LAU] jack 100% CPU when unplugging USB interface

* Peter P. <peterparker@email-addr-hidden> [2015-07-09 11:35]:
> Hi list,
>
> When I unplug my USB Audio interface while jackd is running on that very
> card, jackd's CPU useage peaks and influences the whole operating system
> (RT-kernel, jackd's priority is -11) becomes very unresponsive.
>
> I know that I should not unplug it while jack is running, but sometimes
> I forget that jack runs and this almost takes my computer down.

I did some more testing, and the 100% CPU usage does not happen always,
but in about 50% of the cases.
There are no messages from jackd itself, but dmesg tells

        [unplugging the USB audio interface here]

        [11277.146573] retire_capture_urb: 83 callbacks suppressed
        [11277.313666] usb 2-1.2: USB disconnect, device number 6
        [11277.314506] cannot submit urb (err = -19)
        [11277.315458] cannot submit urb (err = -19)
        [11277.316487] cannot submit urb (err = -19)
        [11277.317489] cannot submit urb (err = -19)
        [11277.318456] cannot submit urb (err = -19)
        [11277.319459] cannot submit urb (err = -19)
        [11277.320527] cannot submit urb (err = -19)
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Received on Thu Jul 9 20:15:02 2015