Tweak the performance of the GPU

modules/gui.nix

@@ -48,6 +48,7 @@ with pkgs;
       export NVIM_LISTEN_ADDRESS=/tmp/nvimsocket
       export GIT_CONFIG_NOSYSTEM=true
       export SYSTEMD_LESS=FRSMK
+      export LIBVA_DRIVER_NAME=iHD
     '';
     wrapperFeatures.gtk = true;
   };

modules/power.nix

@@ -58,7 +58,7 @@
     options mac80211 beacon_loss_count=500
     options iwlwifi power_save=1
     options iwlmvm power_scheme=3
-    options i915 enable_dc=4 enable_fbc=1 enable_psr=1 enable_psr2_sel_fetch=1 disable_power_well=1
+    options i915 enable_guc=2
   '';
 
 }