whatever, still sorta works

modules/nixos/hardware/graphics-nvidia-prime-amd-testing/default.nix

@@ -18,9 +18,13 @@ in
     # Enable NVIDIA driver for X11 and Wayland
     # without modesetting, x server will be run by nvidia
     services.xserver.videoDrivers = [
-      "amdgpu"
-      #"modesetting"
       "nvidia"
+      # "nvidia-drm"
+      # "nvidia-uvm"
+      # "nvidia-modeset"
+      # "nvidiafb"
+      "amdgpu"
+      # "modesetting"
     ];
 
     # Enable OpenGL
@@ -43,13 +47,13 @@ in
 
     # Enable required Kernel Modules
     boot.initrd.kernelModules = [
-      "amdgpu"
       "nvidia"
-    #   # "nvidia-drm"
-    #   # "nvidiafb"
-    #   # # "nvidia-uvm"
-    #   # "nvidia-modeset"
-    #   # "i2c-nvidia_gpu"    
+      "nvidia-drm"
+      "nvidia-uvm"
+      "nvidia-modeset"
+      "nvidiafb"
+      "amdgpu"
+      #   # "i2c-nvidia_gpu"    
     ];
 
 
@@ -83,59 +87,90 @@ in
     #   options nouveau modeset=0
     # '';
 
+    # services.xserver.config = lib.mkForce ''
+    #   Section "ServerLayout"
+    #     Identifier "layout"
+    #     Screen 0 "amdgpu"
+    #     Inactive "nvidia"
+    #     Option "AllowNVIDIAGPUScreens"
+    #   EndSection
+
+    #   Section "Device"
+    #     Identifier "nvidia"
+    #     Driver "nvidia"
+    #     BusID "PCI:01:0:0"
+    #   EndSection
+
+    #   Section "Screen"
+    #     Identifier "nvidia"
+    #     Device "nvidia"
+    #   EndSection
+
+    #   Section "Device"
+    #     Identifier "amdgpu"
+    #     Driver "amdgpu"
+    #     BusID "PCI:50:0:0"
+    #   EndSection
+
+    #   Section "Screen"
+    #     Identifier "amdgpu"
+    #     Device "amdgpu"
+    #   EndSection
+    # '';
+
     # Configure NVIDIA driver
     hardware.nvidia = {
-      # Modesetting is required.
-      modesetting.enable = true;
+    # Modesetting is required.
+    modesetting.enable = true;
 
-      # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
-      # Enable this if you have graphical corruption issues or application crashes after waking
-      # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead 
-      # of just the bare essentials.
-      powerManagement.enable = true;
+    # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
+    # Enable this if you have graphical corruption issues or application crashes after waking
+    # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead 
+    # of just the bare essentials.
+    powerManagement.enable = true;
 
-      # Fine-grained power management. Turns off GPU when not in use.
-      # Experimental and only works on modern Nvidia GPUs (Turing or newer).
-      powerManagement.finegrained = false;
+    # Fine-grained power management. Turns off GPU when not in use.
+    # Experimental and only works on modern Nvidia GPUs (Turing or newer).
+    powerManagement.finegrained = false;
 
-      # Use the NVidia open source kernel module (not to be confused with the
-      # independent third-party "nouveau" open source driver).
-      # Support is limited to the Turing and later architectures. Full list of 
-      # supported GPUs is at: 
-      # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus 
-      # Only available from driver 515.43.04+
-      # Currently alpha-quality/buggy, so false is currently the recommended setting.
-      open = false;
+    # Use the NVidia open source kernel module (not to be confused with the
+    # independent third-party "nouveau" open source driver).
+    # Support is limited to the Turing and later architectures. Full list of 
+    # supported GPUs is at: 
+    # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus 
+    # Only available from driver 515.43.04+
+    # Currently alpha-quality/buggy, so false is currently the recommended setting.
+    open = false;
 
-      # Enable the Nvidia settings menu,
-      # accessible via `nvidia-settings`.
-      nvidiaSettings = true;
+    # Enable the Nvidia settings menu,
+    # accessible via `nvidia-settings`.
+    nvidiaSettings = true;
 
-      # Optionally, you may need to select the appropriate driver version for your specific GPU.
-      package = config.boot.kernelPackages.nvidiaPackages.beta;
-      # package = config.boot.kernelPackages.nvidiaPackages.none;
-      # package = config.boot.kernelPackages.nvidiaPackages.production;
-      nvidiaPersistenced = true;
-      forceFullCompositionPipeline = false;
+    # Optionally, you may need to select the appropriate driver version for your specific GPU.
+    package = config.boot.kernelPackages.nvidiaPackages.beta;
+    # package = config.boot.kernelPackages.nvidiaPackages.none;
+    # package = config.boot.kernelPackages.nvidiaPackages.production;
+    nvidiaPersistenced = true;
+    forceFullCompositionPipeline = true;
 
-      prime = {
-        offload = {
-          enable = true;
-          enableOffloadCmd = true;
-        };
-        # sync.enable=true;
-        # reverseSync.enable = false;
-        # Make sure to use the correct Bus ID values for your system!
-        # intelBusId = "PCI:0:2:0";
-        nvidiaBusId = "PCI:1:0:0";
-        amdgpuBusId = "PCI:50:0:0"; #For AMD GPU
+    prime = {
+      offload = {
+        enable = true;
+        enableOffloadCmd = true;
       };
-
-    };
-    # Add user to extra groups
-    users.users.andreas = {
-      extraGroups = [ "video" "render" ];
+      # sync.enable=true;
+      # reverseSync.enable = false;
+      # Make sure to use the correct Bus ID values for your system!
+      # intelBusId = "PCI:0:2:0";
+      nvidiaBusId = "PCI:1:0:0";
+      amdgpuBusId = "PCI:50:0:0"; #For AMD GPU
     };
 
   };
+  # Add user to extra groups
+  users.users.andreas = {
+    extraGroups = [ "video" "render" ];
+  };
+
+};
 }