9   powerManagement.cpuFreqGovernor = mkDefault "ondemand";
 
  11   boot.cleanTmpDir = true;
 
  12   boot.tmpOnTmpfs = true;
 
  14   boot.kernelModules = [ "kvm-intel" ];
 
  15   # https://bugzilla.kernel.org/show_bug.cgi?id=110941
 
  16   boot.kernelParams = [ "intel_pstate=no_hwp" ];
 
  18   boot.initrd.availableKernelModules = [
 
  27   hardware.cpu.intel.updateMicrocode = true;
 
  28   hardware.opengl.extraPackages = [
 
  29     pkgs.intel-media-driver # LIBVA_DRIVER_NAME=iHD
 
  30     pkgs.vaapiIntel # LIBVA_DRIVER_NAME=i965 (older but works better for Firefox/Chromium)
 
  35   services.upower.enable = true;
 
  36   #services.thermald.enable = true;
 
  54   # No pstore backend available on this system.
 
  55   systemd.services.mount-pstore.enable = false;