No Audio on Lunar Lake Laptop with 25.04

[cr4sh0v3rride]

Ubuntu Version:
Ubuntu 25.04

Desktop Environment (if applicable):
Gnome

Problem Description:
I am attempting to dual boot but have relegated to using an external NVME for testing until I get this issue figured out.
I Install Ubuntu 25.04 with linux kernel 6.14 and everything works with secureboot just fine. Except Audio .
If I install 6.15.2 Kernel from Mainline and Turn off my secureboot, Audio works just fine and I dont get the “Dummy output”
I have tried lots of ways from various github and forum posts to self sign with MOK but my last attempt ended in a Kernel Panic…
I would like to know if there is just a way to get the audio working in Ubuntu 25.04 with the normal signed 6.14 Kernel. And leave my SecureBoot on.

Relevant System Information:
I Have a new Dell 16 Plus 2 in 1 with a Core Ultra 9 288V (Lunar Lake) Model DB06250 if that helps at all.

What I’ve Tried:
Installing 25.04 and updating to Mainline 6.15.2 Gives me Audio with No Issues. I assume its a driver missing in 6.14

[thingizkhan]

Quick fix that keeps Secure Boot:
Install Canonical’s OEM stack, which is based on kernel 6.15, already signed, and maintained with security updates.

sudo apt update
sudo apt install linux-oem-24.04c
sudo reboot

That kernel includes the new Intel Lunar Lake audio DSP driver, so your speakers and microphone should appear in Settings right after the reboot, while Secure Boot remains on.

Why this is safe

linux-oem-24.04c comes from the official Ubuntu repositories, not the mainline PPA.
It receives the same security patches as the generic kernel.
It’s signed by Canonical, so no Manual MOK enrollment is needed.

If you prefer to stay strictly on the generic channel, just wait: Ubuntu will roll a signed 6.15-based generic kernel into the normal noble-updates pocket soon, and sudo apt upgrade will pick it up automatically.

[cr4sh0v3rride]

I have installed Linux 25.04 Plucky, When I Try to run the command I get:

Unable to locate package linux-oem-24.04c
Couldn’t find any package by glob ‘linux-oem-24.04c’

Does this only work on the Noble LTS release?
I Searched Packages.ubuntu.com and Couldn’t find anything newer.

[thingizkhan]

linux-oem-24.04c exists only for 24.04 LTS (Noble). Canonical builds
those “OEM” kernels only for the LTS series, not for the interim
releases like 25.04 Plucky. That’s why APT can’t find the package in
Plucky’s archive.

What to do on 25.04

Stay on the generic kernel; the Lunar-Lake audio patches are already queued
for the next Plucky kernel update.

Keep Secure Boot on and wait a few days
Kernel 6.15 (or newer) will land in the normal plucky-updates pocket
soon. A simple

sudo apt update && sudo apt upgrade

will bring it in and your audio will start working.

If you can’t wait you can enable the proposed pocket temporarily:

sudo add-apt-repository 'deb http://archive.ubuntu.com/ubuntu plucky-proposed main universe'
sudo apt update
sudo apt install linux-image-6.15.0-xx-generic linux-modules-6.15.0-xx-generic
sudo reboot

(xx = the latest build number you see in apt search linux-image-6.15.)
These kernels are fully signed and get security fixes, but proposed
packages can occasionally be reverted, so disable the repo again after
you’ve installed the kernel:

sudo add-apt-repository --remove 'deb http://archive.ubuntu.com/ubuntu plucky-proposed main universe'

Either route keeps you on fully supported, Secure-Boot-signed kernels; the
OEM meta-packages are only needed on LTS releases.

[cr4sh0v3rride]

Thanks @thingizkhan I will give it a try when I get home.