Certain drivers on Chromebooks have issues. On Lenovo 100e Gen 2, audio is one of them. Two links to fix it.
- Update the kernel to at least 6.19
echo "deb http://deb.debian.org/debian trixie-backports main contrib non-free non-free-firmware" | sudo tee /etc/apt/sources.list.d/backports.list
sudo apt update
sudo apt install -t trixie-backports linux-image-amd64 linux-headers-amd64 git -y
sudo reboot
2. Adjust ALSA conf to fix broken paths, etc.
git clone --depth 1 https://github.com/WeirdTreeThing/chromebook-linux-audio
cd chromebook-linux-audio
./setup-audio
sudo reboot
Get Error 404: Not Found
You are correct, that pre-compiled firmware doesn’t seem to exist any more. I just tried trixie-backports to get the latest kernel (6.19 or newer has the audio fix built-in) and it seems to work. I will change the post to reflect this.