fix(gs/yeren): Attempt to work around some of the text flickering issues r/1975

This is a whole pile of things suggested by the internet to fix the
weird text flickering issues I've been seeing. upon first look it seems
like one of the kernel params (or all of them, or some combination of
them) fixed the issue.

Change-Id: Idc98902b46d4cba3bab367f6e22fb9ad10b26a26
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2216
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI

1 files changed, 26 insertions, 0 deletions

diff --git a/users/glittershark/system/system/machines/yeren.nix b/users/glittershark/system/system/machines/yeren.nix
index 541da0969e0e..97298ac0acd9 100644
--- a/users/glittershark/system/system/machines/yeren.nix
+++ b/users/glittershark/system/system/machines/yeren.nix
@@ -28,6 +28,11 @@
     kernelPackages = pkgs.linuxPackages_latest;
     kernelModules = [ "kvm-intel" ];
     extraModulePackages = [ ];
+    kernelParams = [
+      "i915.preliminary_hw_support=1"
+      "i915.enable_rc6=0"
+      "i915.enable_psr=0"
+    ];
   };
 
   fileSystems = {
@@ -43,4 +48,25 @@
   };
 
   swapDevices = [{ device = "/dev/mapper/cryptswap"; }];
+
+  services.xserver = {
+    exportConfiguration = true;
+    extraConfig = ''
+      Section "Device"
+        Identifier  "Intel Graphics"
+        Driver      "intel"
+        Option      "TripleBuffer" "true"
+        Option      "TearFree"     "true"
+        Option      "DRI"          "true"
+        Option      "AccelMethod"  "sna"
+      EndSection
+    '';
+  };
+
+  hardware.opengl.extraPackages = with pkgs; [
+    vaapiIntel
+    vaapiVdpau
+    libvdpau-va-gl
+    intel-media-driver
+  ];
 }