Re: [REGRESSION][BISECTED] My audio broke (was: [PATCH 05/27] ALSA: hda: Move controller drivers into sound/hda/controllers directory)

[Takashi Iwai <tiwai@suse.de>]

On Thu, 16 Oct 2025 11:52:43 +0200,
Takashi Iwai wrote:
> 
> On Thu, 16 Oct 2025 08:03:08 +0200,
> Askar Safin wrote:
> > 
> > I did another experiment.
> > This time with v6.18-rc1.
> > And I collected more info.
> > - Here is Debian config for 6.17.2: [attachment config-6.17.2-amd64]
> > - I downloaded vanilla Linux v6.18-rc1 from kernel.org
> > - I copied that Debian config (see above) as .config to Linux sources
> > - I did "LOCALVERSION=-first make --silent -j32 < /dev/null" ("< /dev/null",
> > because I don't want to answer any questions)
> > - This is output: [attachment first-out]
> > - Then I booted into it
> > - Audio works
> > - Here is config of this kernel: [attachment config-6.18.0-rc1-first]
> > - Here is "find /lib/modules/6.18.0-rc1-first": [attachment
> > find-6.18.0-rc1-first]
> > - Here is alsa-info: [attachment alsa-info-first]
> > - Here is lsmod: [attachment first-lsmod]
> > - Then I "cd" into kernel source (note that ".config" remained since last time)
> > - I typed "make localmodconfig < /dev/null"
> > - Here is output: [attachment localmodconfig-out]
> > - I did "LOCALVERSION=-second make --silent -j32"
> > - This command didn't produce any output and didn't ask any questions
> > - Then I booted into new kernel
> > - Audio doesn't work
> > - Here is config of this kernel: [attachment config-6.18.0-rc1-second]
> > - Here is "find /lib/modules/6.18.0-rc1-second": [attachment
> > find-6.18.0-rc1-second]
> > - Here is alsa-info: [attachment alsa-info-second]
> > - Here is lsmod: [attachment second-lsmod]
> > 
> > (Please, say me, if there are any missing files.)
> > 
> > If you need more experiments, ask me.
> 
> Thanks for detailed logs!  Now the situation became clearer.
> 
> Could you try to just enable CONFIG_SND_SOC_SOF_ALDERLAKE=m on top of
> the broken config?  If my guess is right, this should make the audio
> working again.

Askar, have you tried the above?  I was off in the last week, so
wondering whether I missed your follow up.


thanks,

Takashi

> If yes, it's a problem of a kernel tristate config that doesn't have
> the own module but referred only for constructing a probe table in
> snd-intel-dspcfg.  This is not really a fault of localmodconfig, but a
> long-standing design problem.  (I'm not sure why this surfaced
> suddenly, though.)  There are a few options to address it, and we have
> to evaluate / decide what to do.
> 
> 
> Takashi