Comment # 13 on bug 1213365 from Michael Hirmke

(In reply to Michael Hirmke from comment #12)
> (In reply to Takashi Iwai from comment #11)
> > If only NI box is connected to the hub, and only the hub is connected to the
> > machine, the bug still happens?  Just for narrowing down the condition.
> 
> If only the Thunderbolt box is connected, there are at least the internal
> devices of the box itself connected, too, i.e. a network adapter, a sound
> device and a card reader.
> I'll try to strip it down as much as possible.

Ok, now it really gets mysterious:
I shutdown the notebook, unplugged everything from the Thunderbolt box besides
the audio box and started the notebook - problem was still there.
I then shutdown the machine again, plugged everything back in (in exactly the
same way as it was before), started the notebook - and the problem was gone.
Even after a few reboots the problem didn't reoccur.
I don't understand why, but as it works, I am satisfied :)

Thx!