Fix screen tearing

hosts/pingbox/configuration.nix

@@ -3,6 +3,7 @@
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 {
   config,
+  lib,
   pkgs,
   ...
 }: {
@@ -17,7 +18,7 @@
 
   boot.kernelParams = ["nvme.noacpi=1"];
 
-  hardware.acpilight.enable = true;
+  hardware.acpilight.enable = lib.mkDefault true;
 
   networking = {
     hostName = "pingbox";
@@ -37,6 +38,12 @@
     xserver = {
       dpi = 144;
 
+      videoDrivers = ["intel"];
+      deviceSection = ''
+        Option "DRI" "2"
+        Option "TearFree" "true"
+      '';
+
       libinput.touchpad = {
         naturalScrolling = true;
         horizontalScrolling = false;