I am trying to install the Nvidia driver on my Dell XPS 9550 fresh Debian 12 machine.

I followed all instructions in https://wiki.debian.org/NvidiaGraphicsDrivers#Debian_12_.22Bookworm.22

including:
apt install linux-headers-amd64

Including the extra instructions given here: https://lists.debian.org/debian-user/2025/01/msg00121.html
To enroll the MOK key.

Then added the additional source to apt list and did:
apt install nvidia-driver firmware-misc-nonfree

After rebooting the nvidia driver is not loaded and some errors are presented by dmesg:

$ sudo dmesg | grep modul
[ 4.313816] systemd[1]: Inserted module 'autofs4'
[ 4.586851] systemd[1]: Starting systemd-modules-load.service - Load Kernel Modules...
[ 4.590723] loop: module loaded
[ 5.621417] Loading of module with unavailable key is rejected
[ 5.646333] Loading of module with unavailable key is rejected
...
[ 6.828071] systemd[1]: systemd-modules-load.service: Main process exited, code=exited, status=1/FAILURE
[ 6.828216] systemd[1]: systemd-modules-load.service: Failed with result 'exit-code'.
[ 6.828417] systemd[1]: Failed to start systemd-modules-load.service - Load Kernel Modules.
[ 6.828886] systemd[1]: systemd-modules-load.service: Consumed 2.190s CPU time.
[ 16.905450] Loading of module with unavailable key is rejected
...

$ sudo modprobe nvidia
modprobe: ERROR: could not insert 'nvidia_current': Key was rejected by service modprobe: ERROR: ../libkmod/libkmod-module.c:1047 command_do() Error running install command 'modprobe -i nvidia-current ' for module nvidia: retcode 1
modprobe: ERROR: could not insert 'nvidia': Invalid argument

Can anyone please help me out. Getting Debian to work in this laptop has been a big challenge.

thank you,


Anil F

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On Jan 15, 2025, Anil F Duggirala wrote:

I am trying to install the Nvidia driver on my Dell XPS 9550 fresh
Debian 12 machine.

[ 16.905450] Loading of module with unavailable key is rejected
...

Can anyone please help me out. Getting Debian to work in this laptop
has been a big challenge.

Looks like the machine's SecureBoot setup isn't able to verify the
module, and thus is preventing it from being loaded. Easy "sanity
check" would be to (temporarily) disable that if possible, and try
loading the module again. At the very least, you'll be able to prove
the module itself isn't broken.

If that works, then either

a. You missed a compile-time switch to sign the module OR
b. You missed a post-compile "sign" step OR
c. SecureBoot cannot validate the signature (e.g. your key isn't
loaded into its trust-store, you signed with the wrong key, etc.)

It's not much to go on, but hopefully it helps ...

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Thanks Dan,

I disabled Secure Boot and sure enough, the driver was loaded.

I actually decided to make a clean install of Debian on this machine
and left Secure boot disabled.

I tried multiple times and was unable to get the driver to load. This
is strange however because it did work before.

I wish I was knowledgeable enough to know what a. b. or c.. actually
means, as I said before, I just followed the instructions to create the
MOK and enroll it.
https://wiki.debian.org/SecureBoot#Virtualbox_Packages
I did change "-subj "/CN=My Name/" for -subj "/CN=Myself/"
Could that have created an issue?

thanks again,

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