Comment 289 for bug 1958019

You need to pull the kernel source, know how to apply the patch, how to
configure the kernel, know how to build your kernel, and then to install
it. If you're new to Linux, this may not be for you.

I'm *really* hesitant to provide some random kernel packages. From a
security point of view, I would strongly recommend against installing
packages (especially kernel packages) from some random person's web server.

Hopefully someone following this bug has the time and know-how to setup
a proper PPA for kernel packages with this patch for *buntu. It would
help a lot of people, and it'd be nice to have some more feedback too.

On 6/23/21 7:53 PM, <email address hidden> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=208555
>
> --- Comment #275 <email address hidden> ---
> (In reply to Cameron Berkenpas from comment #273)
>> Created attachment 297583 [details]
>> linux-5.12.12-legion-sound-0.0.4.patch - updated headphone fix, more models
>> supported
>>
>> I've updated the headphone fix. The automute_hook wasn't the fix. Simply
>> having an automute_hook defined means snd_hda_gen_update_outputs() is not
>> called. The call to snd_hda_gen_update_outputs() results in do_automute()
>> being called, which shuts down the speakers putting them into a state where
>> they need to be re-initialized. Setting automute_speaker to off avoids
>> do_automute() breaking the speakers and it seems we can trust the hardware
>> to do the right thing.
>>
>> So please test without any of the other work arounds. Make sure speaker
>> output resumes after unplugging headphones while sound is playing.
>>
>> The good news is that this patch should now affect more than the original
>> 2020 Legion. Here are the models that can test this patch:
>> Lenovo Legion 7i
>> Legion 7 16ACHg6 (2021)
>> Lenovo Yoga 7 14ITL5
>> Yoga 14cITL 2021
>>
>> In the case of the last 2 models, you should only see output from one
>> speaker as the same verbs are being applied as in verbs-working.txt (for
>> now).
>>
>> In the case of the 16ACHg6, I have no idea what to expect. Depends if the
>> speakers require the same (or very similar) initialization sequence or not.
> I have a Legion 7 2020 (alsa-info
> here:http://alsa-project.org/db/?f=c62e1da70c65a4709d137b2a48204cd6ebdeaaa1)
> and a bit of a Linux newbie. I'm on Pop_OS; would you explain how to apply
> this
> patch? My headphone/usb headphones work fine but speakers aren't working.
>