initial commit

2026-08-05 18:57:23 +01:00
commit dda5d14d63
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+{self, ...}: {
+  # Hybrid Intel + NVIDIA (PRIME) for laptops like the T480 (Intel UHD 620 +
+  # NVIDIA MX150). Uses "offload" mode: the dGPU stays powered down by default
+  # (minimal extra battery drain) and is only used for apps launched with
+  # `nvidia-offload <cmd>`. It also pulls in the Intel GPU stack (gpuIntel).
+  #
+  # Bus IDs below are specific to the T480 (from `lspci`):
+  #   Intel  00:02.0 -> PCI:0:2:0
+  #   NVIDIA 01:00.0 -> PCI:1:0:0
+  # Adjust for other machines.
+  flake.nixosModules.gpuNvidiaPrime = {
+    config,
+    pkgs,
+    ...
+  }: {
+    imports = [self.nixosModules.gpuIntel];
+
+    services.xserver.videoDrivers = ["nvidia"];
+
+    hardware.nvidia = {
+      modesetting.enable = true;
+      # MX150 is Pascal (pre-Turing); the proprietary modules are the safe choice.
+      open = false;
+      nvidiaSettings = true;
+      powerManagement.enable = true;
+
+      prime = {
+        # Offload keeps the NVIDIA GPU asleep until explicitly used. This gives
+        # the `nvidia-offload` helper wrapper. Swap to sync mode if you want the
+        # dGPU always driving the display (higher power draw).
+        offload = {
+          enable = true;
+          enableOffloadCmd = true; # provides `nvidia-offload` wrapper
+        };
+
+        intelBusId = "PCI:0:2:0";
+        nvidiaBusId = "PCI:1:0:0";
+      };
+    };
+  };
+}