Re: [PATCH] Revert "ALSA: hda - Enforces runtime_resume after S3 and S4 for each codec"

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On Fri, 24 May 2019 11:40:03 +0200,
Jian-Hong Pan wrote:
> 
> Takashi Iwai <tiwai@xxxxxxx> 於 2019年5月24日 週五 下午1:43寫道:
> >
> > On Fri, 24 May 2019 07:10:17 +0200,
> > Jian-Hong Pan wrote:
> > >
> > > We have an ASUS E406MA laptop equipped with Intel N5000 CPU.  After
> > > system suspend & resume, the audio playback does not work anymore. The
> > > device for sound output is listed as a headphone device.  Plugging in
> > > headphones no sound is audible neither.
> > >
> > > Here are the error messages after resume:
> > >
> > > [  184.525681] snd_hda_intel 0000:00:0e.0: azx_get_response timeout, switching to polling mode: last cmd=0x20bf8100
> > > [  185.528682] snd_hda_intel 0000:00:0e.0: No response from codec, disabling MSI: last cmd=0x20bf8100
> > > [  186.532683] snd_hda_intel 0000:00:0e.0: azx_get_response timeout, switching to single_cmd mode: last cmd=0x20bf8100
> > > [  186.736838] snd_hda_codec_realtek hdaudioC0D0: Unable to sync register 0x2b8000. -5
> > > [  186.738742] snd_hda_codec_realtek hdaudioC0D0: Unable to sync register 0x2b8000. -5
> > > [  186.767080] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 0x2f0d00. -5
> > >
> > > After bisect, we found reverting the commit b5a236c175b0 "ALSA: hda -
> > > Enforces runtime_resume after S3 and S4 for each codec" can solve this
> > > issue on Linux stable 5.0.x series.
> > >
> > > This reverts commit a57af6d07512716b78f1a32d9426bcdf6aafc50c.
> > >
> > > Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=203623
> > > Fixes: a57af6d07512 ("ALSA: hda - Enforces runtime_resume after S3 and S4 for each codec")
> > > Cc: <stable@xxxxxxxxxxxxxxx> # 5.0.x
> > > Signed-off-by: Jian-Hong Pan <jian-hong@xxxxxxxxxxxx>
> >
> > I thought this revert isn't needed if the i915 GLK fix is applied?
> 
> If the i915 GLK fix is applied, then this revert is not needed.
>
> I have also sent the "i915 GLK" to stable mail list for Linux stable
> 5.1.x.  But I am still wondering for 5.0.x, due to the commit
> dependency.
> Any idea for Linux stable 5.0.x will be appreciated.

It'd need a slight modification of the commit, but it should be fairly
easy.


thanks,

Takashi

> 
> Jain-Hong Pan
> 
> > You must hit the very same problem even after reverting this when the
> > machine goes to suspend while playing a stream.  So the revert is no
> > proper fix at all.
> >
> >
> > thanks,
> >
> > Takashi
> 



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