## Environment

- Omarchy 4.0.4-1, Arch, Hyprland (Wayland, wlgrab capture)
- Package: `omarchy/sunshine 2026.516.143833-4.1` (omarchy repo)
- GPU: NVIDIA RTX 2080 Ti (Turing, sm_75), proprietary driver 610.57.04
- Monitor: single 2560x1440

## What happened

Moonlight stream quality is terrible because Sunshine never uses hardware encoding. At startup, encoder probing fails for NVENC and every hardware path, falling back to software libx264:

```
Info: Trying encoder [nvenc]
Info: Creating encoder [h264_nvenc]
...
Error: Couldn't scale frame: Invalid argument
Info: Encoder [nvenc] failed
Info: Trying encoder [vulkan]
Error: [wlgrab] Could not initialize display with the given hw device type.
Info: Encoder [vulkan] failed
Info: Trying encoder [vaapi]
Error: [h264_vaapi ...] No usable encoding entrypoint found for profile VAProfileH264High (7).   # expected: VA-API on NVIDIA is NVDEC-only
Info: Encoder [vaapi] failed
Info: Trying encoder [software]
Info: Found H.264 encoder: libx264 [software]
```

The key line is `Couldn't scale frame: Invalid argument` — the NVENC encoder is created, then the first-frame CUDA scale fails.

## Evidence it's the omarchy build, not the machine

Same machine, same driver, same session:

1. System ffmpeg hardware encode works:

```
$ ffmpeg -f lavfi -i testsrc2=size=2560x1440:rate=60 -t 2 -c:v hevc_nvenc -f null -
# succeeds
```

2. Upstream official builds work:
   - LizardByte AppImage `2026.914.233613`: `Found H.264 encoder: h264_nvenc [nvenc]`, `Found HEVC encoder: hevc_nvenc [nvenc]`, live session encodes with `hevc_nvenc`.
   - AUR `sunshine-bin 2026.906.222525-1` (official binaries packaged): same result, `CLIENT CONNECTED` and the session runs `hevc_nvenc`.

The omarchy repo build is `2026.516` while upstream is at `2026.914`, so this is either a build problem in the omarchy package (e.g. bundled CUDA fatbin missing the Turing/sm_75 arch, so the scale kernel fails to launch with EINVAL) or an upstream wlgrab+NVENC bug fixed between 2026.516 and 2026.906.

## Expected

NVENC (h264_nvenc / hevc_nvenc) works on Turing with the omarchy-packaged sunshine, as it does with official upstream builds.

## Workaround

Install `sunshine-bin` from the AUR instead:

```bash
omarchy pkg aur add sunshine-bin   # conflicts with omarchy/sunshine, remove it when prompted
systemctl --user enable --now app-dev.lizardbyte.app.Sunshine.service
```

Happy to run further diagnostics on the omarchy build if useful (e.g. `cuobjdump` output from the binary, full startup logs).