foureighty - use dri2 as dri3 causes tearing

nixos/boxes/foureighty/default.nix

@@ -5,6 +5,7 @@
     inputs.nixos-hardware.nixosModules.lenovo-thinkpad-t480
     ./hardware-configuration.nix
     ./thermal.nix
+    ../../gfx-intel-dri2.nix
     ../../backups.nix
     ../../boot.nix
     ../../distributed-builds.nix

nixos/gfx-intel-dri2.nix

@@ -0,0 +1,27 @@
+{ config, pkgs, ... }: {
+  services.xserver = {
+    videoDrivers = [ "intel" ];
+    deviceSection = ''
+      Option "DRI" "2"
+      Option "TearFree" "true"
+    '';
+  };
+
+  hardware.opengl = {
+    enable = true;
+    driSupport = true;
+    extraPackages = with pkgs; [
+      vaapiIntel
+      vaapiVdpau
+      libvdpau-va-gl
+      intel-media-driver
+    ];
+  };
+
+  nixpkgs.config = {
+    packageOverrides = pkgs: {
+      vaapiIntel = pkgs.vaapiIntel.override { enableHybridCodec = true; };
+    };
+  };
+
+}

nixos/gfx-intel.nix

@@ -1,5 +1,5 @@
 { config, pkgs, ... }: {
-  services.xserver.videoDrivers = [ "intel" ];
+  services.xserver = { videoDrivers = [ "modesetting" ]; };
 
   hardware.opengl = {
     enable = true;