[External] Re: [PATCH v2 2/2] ALSA: hda/realtek - Replace Lenovo Thinkpad X1 Carbon 7th quirk

[Jaroslav Kysela]

Dne 03. 07. 20 v 12:59 Mark Pearson napsal(a):
> 
>> -----Original Message-----
>> From: Alsa-devel <alsa-devel-bounces at alsa-project.org> On Behalf Of
>> Jaroslav Kysela
>> Sent: Friday, July 3, 2020 6:34 AM
>>
>> Dne 03. 07. 20 v 10:00 Benjamin Poirier napsal(a):
>>> As a result of commit d2cd795c4ece ("ALSA: hda - fixup for the bass
>>> speaker on Lenovo Carbon X1 7th gen"), the sound output level on my machine, an
>>> X1 Carbon 7th gen, was reduced to ~65% of its previous level when playing
>>> certain sounds. [1]
>>>
> <snip>
>>
>> Thank you for this work. Perhaps, Takashi will have some comments to
>> improve this quirk.
> Seconded - thank you!
> 
> <snip>
>>
>>> It is possible that the X1 Carbon 8th gen would benefit from the same
>>> changes but I don't have a device to test that. Fixups are reordered so
>>> that the devices for 7th & 8th gen can share the same chain after the first
>>> fixup. The resulting chain is:
>>
>> 8th gen hardware should be similar, so the new fixup should be applied to this
>> hw, too.
>>
> We'll do some testing here and confirm the fixes on the X1C7 and X1C8 (and Yoga)
> 
> Do let me know if there is any details Lenovo can provide that would help

The functionality of this patch is same like the hda-verb command is executed 
with the current kernel (run as root):

hda-verb /dev/snd/hwC0D0 0x17 SET_CONNECT_SEL 1

You can control tweeters with 'Speaker' volume control.
And headphones and bass speakers with the 'Headphone' volume control.

						Jaroslav


> 
> Mark
> 


-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.