76 lines
1.8 KiB
Nix
76 lines
1.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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enabled = elem "displaylink" config.services.xserver.videoDrivers;
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evdi = config.boot.kernelPackages.evdi;
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displaylink = pkgs.displaylink.override {
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inherit evdi;
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};
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in
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{
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config = mkIf enabled {
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boot.extraModulePackages = [ evdi ];
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boot.kernelModules = [ "evdi" ];
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environment.etc."X11/xorg.conf.d/40-displaylink.conf".text = ''
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Section "OutputClass"
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Identifier "DisplayLink"
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MatchDriver "evdi"
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Driver "modesetting"
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Option "AccelMethod" "none"
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EndSection
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'';
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# make the device available
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services.xserver.displayManager.sessionCommands = ''
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${lib.getBin pkgs.xorg.xrandr}/bin/xrandr --setprovideroutputsource 1 0
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'';
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# Those are taken from displaylink-installer.sh and from Arch Linux AUR package.
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services.udev.packages = [ displaylink ];
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powerManagement.powerDownCommands = ''
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#flush any bytes in pipe
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while read -n 1 -t 1 SUSPEND_RESULT < /tmp/PmMessagesPort_out; do : ; done;
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#suspend DisplayLinkManager
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echo "S" > /tmp/PmMessagesPort_in
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#wait until suspend of DisplayLinkManager finish
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if [ -f /tmp/PmMessagesPort_out ]; then
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#wait until suspend of DisplayLinkManager finish
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read -n 1 -t 10 SUSPEND_RESULT < /tmp/PmMessagesPort_out
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fi
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'';
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powerManagement.resumeCommands = ''
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#resume DisplayLinkManager
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echo "R" > /tmp/PmMessagesPort_in
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'';
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systemd.services.dlm = {
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description = "DisplayLink Manager Service";
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after = [ "display-manager.service" ];
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conflicts = [ "getty@tty7.service" ];
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serviceConfig = {
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ExecStart = "${displaylink}/bin/DisplayLinkManager";
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Restart = "always";
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RestartSec = 5;
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LogsDirectory = "displaylink";
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};
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};
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};
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}
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