[regression] ctxfi: no speaker output when headphones connected on >=7.0.x

[Thorsten Leemhuis]

Hi! Just FYI, I noticed a regression report in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=221461

To quote:

> Dutch Ingraham 2026-05-03 18:12:49 UTC
>
> Kernels >=7.0.1 contain a regression as to Creative Sound Blaster Z SE 
> discrete pci sound card, but not integrated. Kernels 7.0.1, 7.0.2, and 
> 7.0.3 tested; 7.0.0 not tested. Reverting to any 6.18.x or 6.12.x does 
> not present the issue.
> 
> Specifically, using pipewire managed by pavucontrol, on both Gentoo and 
> Arch Linux, when both external speakers and headphones are connected,
> all sound is routed through the headphones regardless of whether settings
> are set to Line Out/Speaker or Line Out/Headphones; there is no speaker 
> output. If headphones are disconnected, without reboot, speakers work; 
> reconnect headphones, without reboot, sound reverts to headphones.
> 
> Kernel: 7.0.3, Gentoo compiled from source using olddefconfig on 6.18.24
> 		.config; Arch standard release
> 'lspci -nnk | grep -i audio' attached
> 'dmesg | grep -i audio' for 7.0.3 and 6.18.24 attached
> pipewire-1.6.4 on both Gentoo and Arch Linux
> alsa-firmware-1.2.4 on both Gentoo and Arch Linux
> 'cat /proc/sys/kernel/tainted' returns 0 for both Gentoo and Arch Linux
> 
> Processor		:	AMD Ryzen7 5700G
> Motherboard		:	Asus Prime X570-Pro
> RAM				:	Patriot Viper Steel DDR-4 @3200mHz
> Graphics        :   ASRock AMD Radeon RX 7600 Challenger 8GB OC
> Sound Card      :   Creative Sound Blaster Z SE
> 
> 
> Expected outcome: ability to choose output to either speakers or head-
> phones while both are plugged-in to sound card.
> 
> Workaround: none known.

See the ticket for more details. One of them: 7.1-rc2 is affected as
well. Reporter is CCed. Forwarded this to ensure this report makes it to
the interested parties, as bugzilla might not have forwarded this.

Dutch Ingraham: if nobody within a few days has an idea why this
happens, you will likely have to use a git bisection to get this resolved.

Ciao, Thorsten