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

[Hans de Goede]

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."

Regards,

Hans