Re: [PATCH] fixup realtek/alc288 headphone for MS Surface 2, 3 and

[Takashi Iwai <tiwai@suse.de>]

On Wed, 19 Nov 2025 18:17:14 +0100,
René Rebe wrote:
> 
> Hi,
> 
> > On 19. Nov 2025, at 16:44, Takashi Iwai <tiwai@suse.de> wrote:
> > 
> > On Wed, 19 Nov 2025 16:13:32 +0100,
> > Takashi Iwai wrote:
> >> 
> >> On Mon, 17 Nov 2025 21:07:34 +0100,
> >> René Rebe wrote:
> >>> 
> >>> On Mon, 17 Nov 2025 17:20:03 +0100, Takashi Iwai <tiwai@suse.de> wrote:
> >>> 
> >>>> On Sun, 16 Nov 2025 16:26:33 +0100,
> >>>> René Rebe wrote:
> >>>>> 
> >>>>> The Surface Pro 2 and 3 have a strage frequency response and miss most
> >>>>> of the bass. I discovered connecting the HP out to the main DAC fixes
> >>>>> this.  Maybe the other is mono or whatever strangely mixed signal for
> >>>>> the built-in speakers?
> >>>>> 
> >>>>> I later noticed the Lenovo Ideapad 720S (AMD) exhibited the same
> >>>>> problem, so this may be a more wide-spread general bug w/ Realtek
> >>>>> codecs and the hda_auto_parser, ...
> >>>> 
> >>>> Usually in a case like this, we provide a fixed wiring by a static DAC
> >>>> table, or do some other tricks instead of directly writing a verb.
> >>>> 
> >>>> Could you give the alsa-info.sh outputs from those?
> >>> 
> >>> Sure, here is an slightly older 6.16 kernel I had at hand that did had
> >>> my fixes applied:
> >> 
> >> Thanks.  Could you give the output from the unpatched kernel, too?
> >> Just to make sure.
> 
> 
> Sorry, typo, I already had booted an old kernel without the patch.
> 
> > ... and if the purpose is to just swap DAC assignments between the
> > headphone and the speaker pins, a patch like below could work better.
> > (The entry is 
> 
> Something missing? But no worries I will try it out and swap entries if
> needed and send a final patch.

Yes please.  I just wanted to say that the entry PCI SSID was copied
from your patch.


Takashi