Comment # 12 on bug 1186648 from Norbert M���ndjen

(In reply to Takashi Iwai from comment #10)
> Hrm, it's a pity that we have too short time for debugging.
> 
> Unless we get a test hardware, it's impossible to debug and fix it. 
> Hopefully it'll get fixed in the upstream, then TW will work out of the box.
> 
> Closed as WONTFIX for now.  Feel free to reopen if you have a chance to
> test/debug again.  Thanks.

Please inform the maintainers of 15.4 and TW. So they know about it. 

For 15.3 it is maybe to late.