Re: [REGRESSION][HDA] Speaker silence on 7.2-rc6: Converter channel allocation misconfigured (channel=0 instead of channel=2)

Re: [REGRESSION][HDA] Speaker silence on 7.2-rc6: Converter channel allocation misconfigured (channel=0 instead of channel=2)

[Takashi Iwai]

On Sat, 08 Aug 2026 14:59:34 +0200,
Zhang DM wrote:
> 
> 
> Hardware Profile:
> 
>    Laptop: ASUS Zenbook S 16 (UM5606WA)
>    
>    Board/Model: ASUSTeK COMPUTER INC. UM5606WA (Firmware UM5606WA.321)
>    
>    Codec: Realtek ALC294 (Subsystem ID: 1043:1df3, PCI: 1022:15e3 at c4:00.6)
>    
> Regression Details:
> 
>    Good Kernel: Linux 7.1.6 / earlier releases (Onboard analog audio out/mic
>     function as expected)
>    
>    Bad Kernel: Linux 7.2.0-rc6 (7.2.0-rc6-1-cachyos-rc)
>    
>    Control Observation: External USB Audio (Moondrop Edge 2, snd-usb-audio)
>     functions without issue. The regression is isolated to the onboard
>     snd_hda_intel / Realtek ALC294 initialization chain.
>    
> Technical Analysis & Diff: Comparing the ALC294 codec state between the
> working baseline and -rc6 shows an improper converter stream mapping in -rc6.
> The active output widgets (Node 0x02 [Headphone] and Node 0x03 [Speaker]) are
> assigned an unexpected stream ID (stream=5), causing silent output or stream
> routing failure.

Hm, I couldn't find any relevant change specific to your device
through a quick glance.  At best, please do git-bisect.


thanks,

Takashi