Built-in speakers don't work in imac 27 2019

[nikgnomic]

@philliex

I had the same issue for a long time, and solved it yesterday by install the Sound Driver for Cirrus Logic CS8409 for iMac27-5k from github.

1. get the kernel version:

   uname -r
   

2. Install package linux-headers, select the same version with kernel

pamac install linux612-headers

3. clone the driver code:

   git clone https://github.com/egorenar/snd-hda-codec-cs8409.git
   

4. compile the code:

   cd snd-hda-codec-cs8409
   

   make
   

5. install the driver (with root user or sudo):

   make install
   

6. reboot system.