[alsa-devel] [PATCH] ALSA: hda: Add Lenovo C50 All in one to the power_save blacklist

[Takashi Iwai]

On Sun, 13 May 2018 15:39:35 +0200,
Hans de Goede wrote:
> 
> Hi,
> 
> On 05/13/2018 08:20 AM, Hans de Goede wrote:
> > Hi Takashi,
> >
> > On 05/13/2018 09:09 AM, Takashi Iwai wrote:
> >> On Tue, 08 May 2018 09:27:46 +0200,
> >> Hans de Goede wrote:
> >>>
> >>> Power-saving is causing loud plops on the Lenovo C50 All in one, add it
> >>> to the blacklist.
> >>>
> >>> BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1572975
> >>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> >>
> >> Before adding to blacklist, could you try some usual suspects?
> >> For Lenovo, you can try at first to pass
> >>    model=,tpt440
> >> to snd-hda-intel module.
> >>
> >> (the first comma is no typo but to pass the model name to the second
> >>   controller for Realtek.)
> >>
> >> The above will add some bogus dock jacks, so it's no solution but to
> >> just to test whether it avoids the clicking noise.
> >
> > Sure, note I'm just forwarding these bugs from Fedora reporters,
> > more often then not I don't have access to the hardware myself.
> >
> > I always add a BugLink tag to the bug, so perhaps next time you
> > can reach out to the reporter directly ? I've forwarded your
> > request this time.
> >
> > I also always ask for alsa-info.sh output, so following the BugLink
> > will also give you access to that.
> 
> So the user just replied:
> 
> "Still hear loud pops with 4.16.7-300.fc28.x86_64 using
> snd_hda_intel.model=,tpt440 (confirmed enabled in sysfs).
> 
> I think in some sense this is just 'poppy' hardware -- it's always emitted a
> pop (though not as loud as these) when the sound card is initialised, even
> under Windows."

OK, then let's add to the blacklist.  Thanks for quick testing and
information!


Takashi