disable intel gup

NixOS.md

@@ -692,9 +692,14 @@ Video acceleration:
   - Video Decode and Presentation API for Unix (VDPAU).
   - Verifying: `vdpauinfo`. https://wiki.archlinux.org/title/Hardware_video_acceleration#Verifying_VDPAU
 
+Verify video driver in use:
+- `lspci -k | grep -EA3 'VGA|3D|Display'`. Example: `Kernel driver in use: amdgpu`
+
 Verification in general:
 - Encode a video or play a game and watch AMD GPU usage with `radeontop`.
 
+Configuration example to disable integrated GUP: See [./hosts/yodaGaming/configuration.nix](./hosts/yodaGaming/configuration.nix)
+
 Configuration example for an AMD GPU (https://github.com/tolgaerok/nixos-kde/blob/main/core/gpu/amd/default.nix): See [./modules/gpu-amd.nix](./modules/gpu-amd.nix)
 
 ## Additional resources

hosts/yodaGaming/configuration.nix

@@ -48,6 +48,13 @@
   # BIOS
   boot.loader.grub.devices = ["/dev/disk/by-id/ata-Samsung_SSD_840_EVO_250GB_S1DBNSAF715594P"];
 
+  # Disable onboard Intel GPU
+  #   https://github.com/NixOS/nixos-hardware/blob/master/common/gpu/intel/disable.nix
+  #   https://discourse.nixos.org/t/fully-disabling-the-nvidia-dgpu-on-an-optimus-laptop/29686/6?u=langfingaz
+  boot.blacklistedKernelModules = [ "i915" ];
+  boot.kernelParams = [ "i915.modeset=0" ];
+
+
   # List all available kernel versions:
   #   `nix repl` -> `:l <nixpkgs>` -> `pkgs.linuxPackages` and press `TAB`
   # Default.

modules/steam.nix

@@ -1,5 +1,7 @@
 { config, pkgs, ... }:
 {
+  # https://wiki.archlinux.org/title/steam#See_also
+
   # flatpak install com.valvesoftware.Steam
 
   # Launching Steam with Flatpak might warn you about installing the steam-devices package to add support for some gamepads.