https://backports.debian.org/Instructions/

  echo deb http://deb.debian.org/debian bookworm-backports main | sudo tee -a /etc/apt/sources.list.d/backports.list
  sudo apt-get update
  sudo apt-get install -t bookworm-backports linux-image-amd64

Season to taste, of course.

(and backports currently has kernel 6.7, not 6.6)

This is why I love Hacker news, you actually provided a solution to the problem. I'm probably going to think a bit on this, how about just using Debain Testing?

Probably not the best option for people unfamiliar with the Debian ecosystem. Debian testing is mostly fine (I've run it on my desktop for more than ten years), but apt WILL occasionally choose the wrong solution in the midst of mass package migrations and it requires vigilance from the user not to accept package upgrades/removals that could render parts of the system unusable.

There's about a year left in the Trixie development cycle so some mass migrations might still happen. If you choose to run testing anyway, make sure that all entries in sources.list refer explicitly to trixie and not testing -- because once trixie is released, testing will automatically point to the next Debian release and you'll get all the joys of the package transitions and mass migrations for trixie+1.

As they say, the greatest thing about Debian testing is that when it breaks you get to keep all the pieces.

Maybe I'll try this in a VM, ultimately I just want my OS to work, but I also run pretty new hardware so my options are somewhat limited.

> (and backports currently has kernel 6.7, not 6.6)

It does, but it also has 6.6. I don't recommend installing 6.7, which is EOL and out of support upstream.