On Sat, 15 Oct 2022 16:56:26 +0200, Jan Henke wrote:

Hello sound system maintainers,

a recent patch to the stable 5.15 linux branch unfortunately introduced a regression. From 5.15.71 onward (also in 5.19.15) plugging in an external headset into the audio jack no longer results in a working microphone. Symptoms are that there is no choice to set the connected device to microphone only (I am using GNOME, so once you plugin a device you get a dialogue to choose it's type, normally there are 3 choices, Headphone, Headset and Microphone, with the bug the last one is missing), and the connected microphone no longer records any audio. Note that you can still choose the headset microphone as audio input, it just does not record anything.

Doing a git bisect I was able to identify the commit introducing this regression:

a963fe6d0eb6ef0a15b3aade7c186cd5bb7bd01f is the first bad commit commit a963fe6d0eb6ef0a15b3aade7c186cd5bb7bd01f Author: Callum Osmotherly callum.osmotherly@gmail.com Date: Thu Sep 15 22:36:08 2022 +0930

ALSA: hda/realtek: Enable 4-speaker output Dell Precision 5530 laptop

commit 1885ff13d4c42910b37a0e3f7c2f182520f4eed1 upstream.

Just as with the 5570 (and the other Dell laptops), this enables the two
subwoofer speakers on the Dell Precision 5530 together with the main
ones, significantly increasing the audio quality. I've tested this
myself on a 5530 and can confirm it's working as expected.

Signed-off-by: Callum Osmotherly <callum.osmotherly@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/YyMjQO3mhyXlMbCf@piranha
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

sound/pci/hda/patch_realtek.c | 1 + 1 file changed, 1 insertion(+)

Which makes sense, since I noticed this regression on a Dell Precision 5530 laptop.

Downstream bug report: https://bugs.gentoo.org/876843

Please revert this commit to restore the previous working condition on all affected branches, since an external headset is a very common use case with these kinds of laptops. There were similar commits for different laptop models, but I do not have any of these models, so I cannot say if they cause a similar regression.

It's been already reverted in the upstream, commit 417b9c51f597.

thanks,

Takashi