Failed to load kernel modules on nixos-rebuild switch and boot

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5

/etc/nixos/configuration.nix for downgrading to 4.19.106 (requires a reboot afterwards)

boot.kernelPackages = pkgs.linuxPackagesFor (pkgs.linux_4_19.override {
  argsOverride = rec {
    src = pkgs.fetchurl {
          url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
          sha256 = "63c8bd76a9b282e18112f8ff9e3fd41e3d1df9f9b7248ea1a370b05a827e9cda";
    };
    version = "4.19.106";
    modDirVersion = "4.19.106";
    };
  });

taken from: Override kernel version - #5 by Alan01252

sudo nixos-rebuild switch && reboot

After that everything is fine :slight_smile: