Re: [PATCH] ALSA: hda/realtek: Fix speakers on ASUS ExpertBook PM3606CHA

[Takashi Iwai <tiwai@suse.de>]

On Sat, 19 Sep 2026 02:07:09 +0200,
Saim Masood wrote:
> 
> The internal speakers of the ASUS ExpertBook PM3606CHA (Realtek ALC256,
> PCI SSID 1043:3501) stay silent with the default codec setup, and the
> headphone jack is not detected either.  The codec needs COEF values that
> differ from its power-on defaults: COEF 0x10, 0x16, 0x35, 0x37 and 0x57
> on NID 0x20 have to be set to the values used by the Windows driver.
> Toggling the codec GPIOs, and the existing ALC256 fixups alone, make no
> difference.
> 
> Apply the COEFs from a new fixup at the INIT action, so that they are
> restored after resume as well.  Chain to ALC256_FIXUP_ASUS_MIC_NO_PRESENCE
> to keep the headset mic and the jack detection working, which the
> fallback pin quirk provided before for this machine.
> 
> The COEF values were found by the reporter of the Ubuntu bug below, who
> compared the codec state against the one under the Windows driver.
> 
> Tested on an ASUS ExpertBook PM3606CHA (BIOS PM3606CHA.304) with the
> change applied to v7.2.5: with this fixup alone, the speakers, the
> headphones with jack detection, and the headset mic all work, also
> after suspend and resume.
> 
> Link: https://bugs.launchpad.net/bugs/2167288
> Signed-off-by: Saim Masood <s.m.saim074@gmail.com>

Applied to for-next branch.  Thanks.


Takashi