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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