use bleeding edge kernel, firmware and mesa

modules/hardware/amd-gpu.nix

@@ -6,11 +6,34 @@ in {
   };
 
   config = lib.mkIf cfg.enable {
+    boot.kernelParams = [ "amdgpu.ppfeaturemask=0xffffffff"  "split_lock_detect=off" ];
+    hardware.graphics = {
+      enable = true;
+      enable32Bit = true;
+      package = lib.mkForce pkgs.mesa-git.mesa.drivers;
+      #extraPackages = with pkgs; [ amdvlk ];
+    };
+
     boot.initrd.kernelModules = [ "amdgpu" ];
     services.xserver.videoDrivers = [ "amdgpu" ];
     # controller (overclock, undervolt, fan curves)
-    environment.systemPackages = with pkgs; [ lact ];
+    environment.systemPackages = with pkgs; [ lact nvtopPackages.amd ];
     systemd.packages = with pkgs; [ lact ];
     systemd.services.lactd.wantedBy = [ "multi-user.target" ];
+
+    #system.replaceDependencies.replacements = [
+    #  { oldDependency = pkgs.mesa; newDependency = pkgs.mesa-git.mesa; }
+    #];
+    hardware.firmware = with pkgs;
+      [
+        (linux-firmware.overrideAttrs (old: {
+          src = builtins.fetchGit {
+            url =
+              "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git";
+            rev =
+              "b4cb02b2dc3330c6e5d69e84a616b1ca5faecf12"; # Uncomment this line to allow for pure builds
+          };
+        }))
+      ];
   };
 }