Comment 3 for bug 1880835

After debugging a bit. I narrowed down the problem.

It is related to the FireWire800 auido adapter (Tascam FireOne) the device goes in to a non working state. It seems that the the control part of the communication works. But The SoundCard is in a dead lock. And it hangs the kernel diver communication.

The the problem solved by power cycle the Tascan FireOne device and reboot the ubuntu laptop. After the boot then the audio works again and pulseaudio does not hang any more.

So it seems the the problem caused by the device communication misbehavior on the filerwire port.

I think the kernel driver shall be examined to able to cope with the errors from the device side.

Since this breaks done the complete audio subsystem and the machine can not even rebooted.