Comment # 58 on bug 944978 from Takashi Iwai

(In reply to Takashi Iwai from comment #57)
> Maybe some wild interrupts are left unhandled?

Scratch it, I was confused.  But...

> If so, setting the debug option might show something?

... this may be still valid.  Alberto, could you try to blacklist the driver
then load it manually with debug=5 option but without int_clear=0?  (Remove it
when set in modprobe.d/*)
This should lead to a stall again but with more verbose logs.

Reading back this bug, I wonder why the old KMP works.  Do you still have 4.1.9
and KMP on your system?