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 = [
+      "nvidia"
+      # "nvidia-drm"
+      # "nvidia-uvm"
+      # "nvidia-modeset"
+      # "nvidiafb"
       "amdgpu"
       # "modesetting"
-      "nvidia"
     ];
 
     # Enable OpenGL
@@ -43,12 +47,12 @@ in
 
     # Enable required Kernel Modules
     boot.initrd.kernelModules = [
-      "amdgpu"
       "nvidia"
-    #   # "nvidia-drm"
+      "nvidia-drm"
-    #   # "nvidiafb"
+      "nvidia-uvm"
-    #   # # "nvidia-uvm"
+      "nvidia-modeset"
-    #   # "nvidia-modeset"
+      "nvidiafb"
+      "amdgpu"
       #   # "i2c-nvidia_gpu"    
     ];
 
@@ -83,6 +87,37 @@ 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.
@@ -116,7 +151,7 @@ in
     # package = config.boot.kernelPackages.nvidiaPackages.none;
     # package = config.boot.kernelPackages.nvidiaPackages.production;
     nvidiaPersistenced = true;
-      forceFullCompositionPipeline = false;
+    forceFullCompositionPipeline = true;
 
     prime = {
       offload = {