fix cpu detection

common/hardware/laptop.nix

@@ -44,13 +44,13 @@ in
 
     boot = {
       kernelParams = [
-        "splash"
-        "quiet"
-        "intel_iommu=on"
-        "iommu=force"
-        "pcie_acs_override=downstream"
-        "mmio_stale_data=full,nosmt"
-        "pcie_aspm=off"
+#        "splash"
+#        "quiet"
+#        "intel_iommu=on"
+#        "iommu=force"
+#        "pcie_acs_override=downstream"
+#        "mmio_stale_data=full,nosmt"
+#        "pcie_aspm=off"
       ]; #  "vfio-pci.ids=10de:1aeb,10de:2191,10de:1aed,10de:1aec" ];
       initrd.availableKernelModules = [
         "xhci_pci"
@@ -73,10 +73,10 @@ in
           }))
       ];
       kernelModules = [
-        "kvm-intel"
-        "vfio_pci"
-        "vfio_iommu_type1"
-        "vfio"
+ #       "kvm-intel"
+ #       "vfio_pci"
+ #       "vfio_iommu_type1"
+ #       "vfio"
         "ddcci_backlight"
         "i2c-dev"
       ];

specific/grimm-nixos-laptop/configuration.nix

@@ -8,10 +8,6 @@
 
   networking.hostName = "grimmauld-nixos";
 
-  environment.sessionVariables = {
-    OMP_NUM_THREADS = "12";
-  };
-
   system.stateVersion = "23.05";
 
   grimmShared.gaming = true;

specific/grimm-nixos-laptop/hardware-configuration.nix

@@ -1,9 +1,9 @@
 # Do not modify this file!  It was generated by ‘nixos-generate-config’
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
+{ config, lib, pkgs, modulesPath, ... }: let
+  cpus = "12";
+in {
   imports =
     [
       (modulesPath + "/installer/scan/not-detected.nix")
@@ -12,6 +12,7 @@
 
   boot.initrd.kernelModules = [ ];
   boot.extraModulePackages = [ ];
+  boot.kernelParams = [ "possible_cpus=${cpus}" ];
 
   fileSystems."/" =
     {
@@ -32,6 +33,10 @@
     size = 48 * 1024;
   }];
 
+  environment.sessionVariables = {
+    OMP_NUM_THREADS = cpus;
+  };
+
   grimmShared = {
     screens = {
       external = {