Internal Microphone Not Working on Lenovo Yoga Slim 7 Pro with Linux Mint 22.1

["Ali Fuat Paşalıoğlu" <afuatpasalioglu@gmail.com>]

Dear Linux Mint Support Team,

I am a passionate and grateful new user of Linux Mint. I recently 
switched from Windows and have been enjoying the system stability and 
user-friendly experience. As a newcomer to Linux, I manage to handle 
many tasks with the help of the terminal and ChatGPT.

However, I am facing a persistent issue that has significantly affected 
my workflow:

 > My internal microphone is not working on my Lenovo Yoga Slim 7 Pro 
(AMD Ryzen 5 6600HS + Realtek ALC257 codec).



Note: Not long ago, I was able to use this same internal microphone 
under Linux Mint on this very laptop, including in Zoom-like 
applications. This suggests that either a kernel, driver, or PipeWire 
update might have broken support recently.

I have tested multiple approaches, including:

Switching between PulseAudio and PipeWire

Modifying /etc/modprobe.d/alsa-base.conf with various model parameters:

model=lenovo

model=ideapad

model=dual-codecs

model=auto


Verifying with alsamixer that Mic ACP LED remains off (disabled)

Using pavucontrol, but the input device shows as "Microphone (unplugged)"


The microphone works perfectly under Windows.

Due to this limitation, I am forced to carry and use an external USB 
microphone during my online meetings. While this workaround helps, it’s 
inconvenient, and I hope this issue can be resolved at the 
driver/firmware/kernel level for AMD + Realtek-based laptops like mine.

System Details:

Distro: Linux Mint 22.1 Xia (based on Ubuntu 24.04 Noble)

Kernel: 6.8.0-59-generic

Desktop: Cinnamon 6.4.8 (Muffin 6.4.1)

Laptop: Lenovo Yoga Slim 7 Pro 14ARH7

CPU: AMD Ryzen 5 6600HS Creator Edition

Audio Codec: Realtek ALC257 (with ACP/ACP6x support)

Sound backends tested: PulseAudio, PipeWire

Audio devices detected:

AMD Rembrandt HD Audio (snd_hda_intel)

AMD ACP/ACP6x Audio Coprocessor (snd_pci_acp6x)

AMD Family 17h/19h HD Audio (snd_hda_intel)


Current workaround: BOYA M1 via USB-C DAC (recognized as USB Audio)


Please consider improving support for this hardware combination. I 
really love Linux Mint and want to stick with it long-term.

Thank you for your work!

Best regards, Ali Fuat