I am currently running Debian 12 with Gnome using the 6.6.9-amd64 kernel, and have had quite the issues with the newer kernels. Once i switch to them in the grub menu, I am only able to use a single monitor which has been set to a sub-normal resolution. Also animations for the DE are all gone. I can’t add my other monitors in, my nvidia settings panel lost most of its settings (from about 20 tabs to 3) and the entire system runs really poorly. While part of this seems to be an nvidia thing, I do wonder how I would actually go about fixing this.
DKMS isn’t installed or is broken. The whole point of it is to update things when a new kernel gets installed.
Yeah, unfortunately that’s not always possible as modules don’t always build against newer kernels. Also I don’t know if Debian uses dkms for this. On Ubuntu for example, NVIDIA modules are shipped in a pre-compiled form for the supported kernels instead of using dkms.