No Audio on Kernel: 6.12.15 and Armbian 25.2.2 Bookworm Minimal

[Truenox]

Hello again,
 

We're already aware of the existing issues with kernel 6 and the audio on the RK3308B. In this case, it fails again in the latest versions... Alsamixer detects the audio card and even shows it in arecord -L or arecord -l, but when trying to record, the error appears:
 

"arecord: set_params:1416: unable to install hw params"
 

The command applied is:

arecord -c 2 -r 192000 -f S32_LE test.wav
 

Although if I leave it without parameters to see what it does, it throws the same error, even if I specify the hardware... In the previous kernel (I think it was 6.12.11 (with the u-boot issue in the previous post), the audio worked perfectly).

Thanks for all.

Edited May 7 by Truenox

[brentr]

I was able to duplicate this problem. 

Audio output appears to be working in both edge and current branches. 

But,

The "arecord: set_params:1416: unable to install hw params" error occurs in the current branch as well.  This is running kernel 6.12.28

 

the example arecord command you gave appears to work in kernel 6.12.12.  So, the breakage occurred between 6.12.12 and 6.12.28

[brentr]

I just verified that the arecord command fails also with kernel

6.12.15

 

So, we now know the breakage occurred between 6.12.12 and 6.12.15

 

[brentr]

The breakage occurred between Armbian 25.2.1 and Armbian 25.2.2

 

[Truenox]

Dear @brentr,

It seems to be a common bug that keeps reappearing.
 

And as far as I understand, it's a fix that needs to be applied to the kernel because otherwise, it won't work.
 

Isn't there a way to make an external fix, which the user can install if needed and which can be applied to any kernel?
 

If this bug is hardcoded, I imagine it's impossible and must be modified every time the kernel is compiled...

I'm sorry I can't help much except by reporting the bug.

Thank you for your contribution and the work you do, both to you and the community.