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