mirror of
https://github.com/buckley310/nixos-config.git
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92 lines
2.7 KiB
Nix
92 lines
2.7 KiB
Nix
{ lib, pkgs, ... }:
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let
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current-mode = "nvidia-mux";
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constants = {
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hardware.nvidia.prime.intelBusId = "PCI:0:2:0";
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hardware.nvidia.prime.nvidiaBusId = "PCI:1:0:0";
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boot.kernelPackages = pkgs.linuxPackages_6_0;
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boot.zfs.enableUnstable = true; # TODO: remove
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};
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available-modes = {
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nvidia = {
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### "sync mode"
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#
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# good:
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# max performance on external displays
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# no BIOS settings change needed
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#
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# bad:
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# graphics performance overhead on internal display
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# internal display capped at 60hz
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#
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hardware.nvidia.prime.sync.enable = true;
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hardware.nvidia.modesetting.enable = true;
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services.xserver.displayManager.gdm.wayland = false;
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services.xserver.videoDrivers = [ "nvidia" ];
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# xrandr workaround for laptop panel not showing up with GDM. Reference:
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# https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/hardware/video/nvidia.nix
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services.xserver.displayManager.sessionCommands = ''
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${pkgs.xorg.xrandr}/bin/xrandr --setprovideroutputsource modesetting NVIDIA-0
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'';
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};
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nvidia-mux = {
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### optimus disabled in BIOS with MUX switch.
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#
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# good:
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# simple, always works.
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# max performance everywhere.
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#
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# bad:
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# cant change laptop brightness.
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# requires BIOS setting changes, which is annoying.
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#
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boot.kernelParams = [ "module_blacklist=i915" ];
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services.xserver.displayManager.gdm.wayland = false;
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services.xserver.videoDrivers = [ "nvidia" ];
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};
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intel = {
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### nvidia drivers disabled
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#
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# Not well tested. Possibly Incomplete.
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# Won't allow external displays connected to nvidia GPU.
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#
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# Shutting off Nvidia GPU would theoretically save power.
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# I do not think this actually powers down the Nvidia GPU, just stops using it.
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#
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boot.kernelParams = [ "module_blacklist=nouveau" ];
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};
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hybrid = {
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### hybrid graphics
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#
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# Not well tested. Possibly Incomplete.
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# Won't allow external displays connected to nvidia GPU.
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#
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# Everything would use intel by default,
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# but specific apps would run on the nvidia GPU under the script.
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#
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hardware.nvidia.prime.offload.enable = true;
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services.xserver.videoDrivers = [ "nvidia" ];
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environment.systemPackages = [
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(pkgs.writeShellScriptBin "nv" ''
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export __NV_PRIME_RENDER_OFFLOAD=1
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export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
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export __GLX_VENDOR_LIBRARY_NAME=nvidia
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export __VK_LAYER_NV_optimus=NVIDIA_only
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exec "$@"
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'')
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];
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};
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};
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in
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lib.mkMerge [
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(constants)
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(available-modes.${current-mode})
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]
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