Re: snd_usb_audio crashes my audio

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On Sun, 05 Jan 2014 18:08:40 +0000, Daniel Mack wrote:
> Dennis New <dennisn@xxxxxxxxxxxxxxxxxx> wrote:
> >For the past many linux kernels,
> 
> Can you spot the last kernel version that worked for you?
> 
> >my usb bluetooth headset randomly
> >crashes -- the audio abruptly stops working, I cannot kill -9 the
> >mplayer process that was using it, and the only way to get it working
> >again is to reboot :|.
> >
> >The syslog only says:
> >  kernel: ALSA sound/usb/endpoint.c:501 timeout: still 3 active urbs
> > on
> >EP #3
> 
> That's odd, and frankly is more a sign of a USB host controller issue
> that one with snd-usb-audio. Can you provide a full dmesg output? Do
> you have the same issue with that headset on a different machine?
> 
> >It is very difficult to reproduce -- sometimes it can go for days
> >just fine, then in the middle of a song abruptly stop.
> 
> Please try harder :-) Without a proper test case, it seems impossible
> to verify a potential fix. Quickly starting and stopping the stream
> might be a good start.
> 
> Also, as stated above, please do test on a different machine. Ruling
> out the host controller would be a crucial step.

Here's another crash log. ohci_urb_dequeue seems to show up often in
the tracebacks of the hung processes.

http://dennisn.dyndns.org/guest/pubstuff/debug-usbaudio/crash2.log


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