diff options
Diffstat (limited to 'nixos/modules/hardware')
-rw-r--r-- | nixos/modules/hardware/video/nvidia.nix | 120 |
1 files changed, 116 insertions, 4 deletions
diff --git a/nixos/modules/hardware/video/nvidia.nix b/nixos/modules/hardware/video/nvidia.nix index eb1952280331..6944d1a4f76b 100644 --- a/nixos/modules/hardware/video/nvidia.nix +++ b/nixos/modules/hardware/video/nvidia.nix @@ -26,9 +26,73 @@ let nvidia_libs32 = (nvidiaForKernel pkgs_i686.linuxPackages).override { libsOnly = true; kernel = null; }; enabled = nvidia_x11 != null; + + cfg = config.hardware.nvidia; + optimusCfg = cfg.optimus_prime; in { + options = { + hardware.nvidia.modesetting.enable = lib.mkOption { + type = lib.types.bool; + default = false; + description = '' + Enable kernel modesetting when using the NVIDIA proprietary driver. + + Enabling this fixes screen tearing when using Optimus via PRIME (see + <option>hardware.nvidia.optimus_prime.enable</option>. This is not enabled + by default because it is not officially supported by NVIDIA and would not + work with SLI. + ''; + }; + + hardware.nvidia.optimus_prime.enable = lib.mkOption { + type = lib.types.bool; + default = false; + description = '' + Enable NVIDIA Optimus support using the NVIDIA proprietary driver via PRIME. + If enabled, the NVIDIA GPU will be always on and used for all rendering, + while enabling output to displays attached only to the integrated Intel GPU + without a multiplexer. + + Note that this option only has any effect if the "nvidia" driver is specified + in <option>services.xserver.videoDrivers</option>, and it should preferably + be the only driver there. + + If this is enabled, then the bus IDs of the NVIDIA and Intel GPUs have to be + specified (<option>hardware.nvidia.optimus_prime.nvidiaBusId</option> and + <option>hardware.nvidia.optimus_prime.intelBusId</option>). + + If you enable this, you may want to also enable kernel modesetting for the + NVIDIA driver (<option>hardware.nvidia.modesetting.enable</option>) in order + to prevent tearing. + + Note that this configuration will only be successful when a display manager + for which the <option>services.xserver.displayManager.setupCommands</option> + option is supported is used; notably, SLiM is not supported. + ''; + }; + + hardware.nvidia.optimus_prime.nvidiaBusId = lib.mkOption { + type = lib.types.string; + default = ""; + example = "PCI:1:0:0"; + description = '' + Bus ID of the NVIDIA GPU. You can find it using lspci; for example if lspci + shows the NVIDIA GPU at "01:00.0", set this option to "PCI:1:0:0". + ''; + }; + + hardware.nvidia.optimus_prime.intelBusId = lib.mkOption { + type = lib.types.string; + default = ""; + example = "PCI:0:2:0"; + description = '' + Bus ID of the Intel GPU. You can find it using lspci; for example if lspci + shows the Intel GPU at "00:02.0", set this option to "PCI:0:2:0". + ''; + }; + }; config = mkIf enabled { assertions = [ @@ -36,16 +100,62 @@ in assertion = config.services.xserver.displayManager.gdm.wayland; message = "NVidia drivers don't support wayland"; } + { + assertion = !optimusCfg.enable || + (optimusCfg.nvidiaBusId != "" && optimusCfg.intelBusId != ""); + message = '' + When NVIDIA Optimus via PRIME is enabled, the GPU bus IDs must configured. + ''; + } ]; - services.xserver.drivers = singleton - { name = "nvidia"; modules = [ nvidia_x11.bin ]; libPath = [ nvidia_x11 ]; }; + # If Optimus/PRIME is enabled, we: + # - Specify the configured NVIDIA GPU bus ID in the Device section for the + # "nvidia" driver. + # - Add the AllowEmptyInitialConfiguration option to the Screen section for the + # "nvidia" driver, in order to allow the X server to start without any outputs. + # - Add a separate Device section for the Intel GPU, using the "modesetting" + # driver and with the configured BusID. + # - Reference that Device section from the ServerLayout section as an inactive + # device. + # - Configure the display manager to run specific `xrandr` commands which will + # configure/enable displays connected to the Intel GPU. + + services.xserver.drivers = singleton { + name = "nvidia"; + modules = [ nvidia_x11.bin ]; + libPath = [ nvidia_x11 ]; + deviceSection = optionalString optimusCfg.enable + '' + BusID "${optimusCfg.nvidiaBusId}" + ''; + screenSection = + '' + Option "RandRRotation" "on" + ${optionalString optimusCfg.enable "Option \"AllowEmptyInitialConfiguration\""} + ''; + }; - services.xserver.screenSection = + services.xserver.extraConfig = optionalString optimusCfg.enable + '' + Section "Device" + Identifier "nvidia-optimus-intel" + Driver "modesetting" + BusID "${optimusCfg.intelBusId}" + Option "AccelMethod" "none" + EndSection + ''; + services.xserver.serverLayoutSection = optionalString optimusCfg.enable '' - Option "RandRRotation" "on" + Inactive "nvidia-optimus-intel" ''; + services.xserver.displayManager.setupCommands = optionalString optimusCfg.enable '' + # Added by nvidia configuration module for Optimus/PRIME. + ${pkgs.xorg.xrandr}/bin/xrandr --setprovideroutputsource modesetting NVIDIA-0 + ${pkgs.xorg.xrandr}/bin/xrandr --auto + ''; + environment.etc."nvidia/nvidia-application-profiles-rc" = mkIf nvidia_x11.useProfiles { source = "${nvidia_x11.bin}/share/nvidia/nvidia-application-profiles-rc"; }; @@ -62,6 +172,8 @@ in boot.kernelModules = [ "nvidia-uvm" ] ++ lib.optionals config.services.xserver.enable [ "nvidia" "nvidia_modeset" "nvidia_drm" ]; + # If requested enable modesetting via kernel parameter. + boot.kernelParams = optional cfg.modesetting.enable "nvidia-drm.modeset=1"; # Create /dev/nvidia-uvm when the nvidia-uvm module is loaded. services.udev.extraRules = |