Re: pulseaudio fails to start with kernel 4.11, caused by new snd_hdmi_lpe_audio module)

[Arun Raghavan <arun@arunraghavan.net>]

On Tue, 21 Mar 2017, at 11:10 AM, Takashi Iwai wrote:
> On Tue, 21 Mar 2017 00:09:22 +0100,
> Pierre-Louis Bossart wrote:
> > 
> > On 3/20/17 4:52 AM, Takashi Iwai wrote:
> > > On Mon, 20 Mar 2017 12:42:58 +0100,
> > > Hans de Goede wrote:
> > >>
> > >> Hi,
> > >>
> > >> Lately I've been working on fixing various issues people
> > >> are having with baytrail / cherrytrail devices. One thing
> > >> I noticed when moving my testing / development to 4.11 is
> > >> that pulseaudio does not work (it aborts while starting)
> > >> this seemed to be caused by the new snd_hdmi_lpe_audio
> > >> module. If I blacklist that all is fine. Any idea what
> > >> is causing this ?
> > >
> > > I noticed it once, too, but I had no time to check further.
> > > More interestingly, PA works fine when LPE audio is the single driver
> > > (i.e. blacklist Intel SST instead), too.  So it's more likely a bug in
> > > PA.
> > >
> > > What happens when you modprobe LPE audio driver after starting the
> > > session?  If it kills PA, we can debug more easily :)
> > 
> > I've seen this as well, I could get either one of the two but not
> > both, could this be due to the fact that one set of mixers is
> > configured with UCM and the other driver isn't configured by UCM?
> 
> No idea, and I had still no time to check (still processing the
> pile of pending mails and other bugs :).  Let me add PA guys to Cc.

Not sure if anyone here has the hardware and I haven't seen any
complaints either -- having a backtrace (or even location of the assert)
would be a good start.

Cheers,
Arun
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