nixpkgs/nixos/modules/services/hardware/amd-hybrid-graphics.nix
2016-12-17 10:38:12 +00:00

47 lines
1.2 KiB
Nix

{ config, pkgs, lib, ... }:
{
###### interface
options = {
hardware.amdHybridGraphics.disable = lib.mkOption {
default = false;
type = lib.types.bool;
description = ''
Completely disable the AMD graphics card and use the
integrated graphics processor instead.
'';
};
};
###### implementation
config = lib.mkIf config.hardware.amdHybridGraphics.disable {
systemd.services."amd-hybrid-graphics" = {
path = [ pkgs.bash ];
description = "Disable AMD Card";
after = [ "sys-kernel-debug.mount" ];
before = [ "systemd-vconsole-setup.service" "display-manager.service" ];
requires = [ "sys-kernel-debug.mount" "vgaswitcheroo.path" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.bash}/bin/sh -c 'echo -e \"IGD\\nOFF\" > /sys/kernel/debug/vgaswitcheroo/switch'";
ExecStop = "${pkgs.bash}/bin/sh -c 'echo ON >/sys/kernel/debug/vgaswitcheroo/switch'";
};
};
systemd.paths."vgaswitcheroo" = {
pathConfig = {
PathExists = "/sys/kernel/debug/vgaswitcheroo/switch";
Unit = "amd-hybrid-graphics.service";
};
wantedBy = ["multi-user.target"];
};
};
}