Comment 86 for bug 1958019

(In reply to Cameron from comment #72)
> Vanilla 5.4.88 doesn't resolve the issue, at least not for me on Kubuntu
> 20.10. Earlier 5.4 kernels that I've tested in the past have not fixed
> the issue.
>
> I'm not really familiar with Arch... but if I can find the Arch patchset
> for 5.4.88, I'll try it out and report back.
>
> On 2/7/21 10:31 AM, <email address hidden> wrote:
> > https://bugzilla.kernel.org/show_bug.cgi?id=208555
> >
> > --- Comment #71 from <email address hidden> ---
> > (In reply to Grigory Malivenko from comment #70)
> >> (In reply to TT from comment #69)
> >>> So which pins are you specifically talking about?
> >>>
> >>> What about comparing to the Arch Linux configuration?
> >>> People mentioned here that the sound works with Arch Linux fresh
> >>> installation.
> >> I tried Arch Linux fresh installation + Lenovo Legion 7 15IMH05 and
> speakers
> >> don't work.
> > On my system, the Lenovo Yoga Duet 7i, volume doesn't work out of the box.
> > I've
> > not found any arch systems that have sound working out of the box. You must
> > use
> > earlier an earlier LTS kernel "5.4.88-1-lts". Upgrading to 5.4.89-1-lts and
> > newer will break sound again. I'm not sure why this is such a big deal now
> > since I've mentioned this. Devs could just use whatever works in 5.4.88 LTS
> > and
> > add it to newer kernels. Or tell us how to do it and I'll try myself.
> >

Then there must be some other differences with sound for the Legion 7i and the Yoga Duet 7i. Try removing sof-firmware and make sure it isn't muted in pavucontrol