further tweaks

systems/x86_64-linux/drivebystation-nix/hardware/graphics/intel.nix

@@ -53,7 +53,19 @@
   ];
 
   environment.variables = {
+    # Force Intel GPU for all graphics operations
     KWIN_DRM_DEVICES = "/dev/dri/card0";
+    
+    # Vulkan/DXVK optimizations for B580
+    ANV_ENABLE_PIPELINE_CACHE = "1";
+    
+    # Shader cache settings
+    MESA_SHADER_CACHE_DISABLE = "false";
+    MESA_SHADER_CACHE_MAX_SIZE = "10G";
+    
+    # DXVK optimizations
+    DXVK_HUD = "compiler";  # Monitor shader compilation
+    # DXVK_ASYNC = "1";     # Enable if you want async shader compilation (may cause issues)
   };