Miguel Palhas
66 lines
3.1 KiB
Nix
66 lines
3.1 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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# Sunshine — self-hosted game-stream host for Moonlight clients (the NVIDIA
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# Shield runs Moonlight). Host-level because it needs root-owned bits: display
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# capture, /dev/uinput for virtual gamepad/mouse, and firewall ports.
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#
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# Hardware (NVENC) encoding on this box needs two things that the stock
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# nixpkgs setup doesn't give you:
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#
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# 1. A CUDA-enabled Sunshine. The default build is compiled with
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# -DSUNSHINE_ENABLE_CUDA=FALSE, so it has the NVENC *encoders* but no CUDA
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# frame-scaling/colour-conversion path — every NVENC probe dies with
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# "Couldn't scale frame: Invalid argument" and it silently falls back to
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# CPU x264. `cudaSupport = true` rebuilds it with CUDA.
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#
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# 2. libcuda.so.1 discoverable at runtime. It lives in /run/opengl-driver/lib
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# (NVIDIA driver), which isn't on Sunshine's default library path, so we
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# add it via LD_LIBRARY_PATH on the service.
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#
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# capSysAdmin is deliberately OFF: Hyprland is wlroots-based, so Sunshine
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# captures via wlr-screencopy and never needs CAP_SYS_ADMIN. Keeping the setcap
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# wrapper would be worse than useless here — glibc runs setcap binaries in
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# secure-execution mode, which *ignores* LD_LIBRARY_PATH, so it would break the
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# libcuda loading from (2) and take NVENC down with it.
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#
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# The NVIDIA specifics above are the only vendor-aware bits; capSysAdmin =
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# false + wlr-screencopy is correct for any wlroots compositor, and on an
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# AMD/Intel host you'd drop cudaSupport and use VAAPI instead.
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#
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# First run: open https://<host>:47990 to set the web-UI credentials, then pair
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# the Shield (enter the PIN Moonlight shows). Moonlight discovers the host via
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# Sunshine's built-in mDNS.
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{
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services.sunshine = {
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enable = true;
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package = pkgs.sunshine.override { cudaSupport = true; };
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autoStart = true; # start with the graphical session
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openFirewall = true; # 47984-48010 TCP + 47998-48010 UDP for Moonlight
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capSysAdmin = false; # wlr-screencopy capture; see header re: libcuda
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};
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# Let Sunshine find the NVIDIA driver's libcuda.so.1 for NVENC. Merges into
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# the module's own systemd.user.services.sunshine definition.
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systemd.user.services.sunshine.environment.LD_LIBRARY_PATH = "/run/opengl-driver/lib";
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# DualSense/DualShock emulation. Sunshine presents a *real* PS5 HID (touchpad,
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# motion, LEDs, rumble) via /dev/uhid, not plain uinput — a uinput pad can't
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# carry those features. The kernel uhid node is root-only (0600) with no udev
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# rule, so Sunshine (a user service) can't open it and silently falls back to
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# an Xbox pad: "Unable to create virtual DualShock 5 controller: Permission
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# denied".
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#
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# NOTE: `uaccess` does NOT work for uhid — unlike uinput it isn't attached to
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# the seat (no `seat` tag), so logind never grants the ACL. Use a group grant
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# instead, mirroring Sunshine's upstream uinput rule: group `input`, mode 0660
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# (naps62 is already in `input`). Deterministic, no seat/session dependency.
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boot.kernelModules = [ "uhid" ];
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services.udev.extraRules = ''
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KERNEL=="uhid", SUBSYSTEM=="misc", MODE="0660", GROUP="input"
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'';
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}
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