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45 lines
3.1 KiB
Markdown
45 lines
3.1 KiB
Markdown
# Historical Steam Frame API probes — 2026-09-24
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These observations were made on one device and SteamOS build, not rerun as part
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of this repository's scaffold. They do not prove current availability or headset
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acceptance. No probe code, user audio, credentials or runtime binaries are shipped.
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See the [design](../design.md) for proposed implementation and safety gates.
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## Environment
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SteamOS 0.4.0 (VR variant), AArch64, glibc 2.39, Python 3.12.3;
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Gamescope 3.16.28-2. Linux ARM64 package availability is not evidence of
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inference speed or compatibility with this device.
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## Observations and limits
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| Surface | Historical observation | Limit |
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| --- | --- | --- |
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| OpenVR | Native `VRApplication_Overlay` initialization succeeded; `IVROverlay_028`, `IVRInput_011`, `IVRSystem_026` and `IVRApplications_008` were accepted. | No rendered overlay, binding or autolaunch test. |
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| Gamescope IME | `gamescope_input_method_manager` v3 advertised; v2 binding accepted and returned `done(serial=1)`. | Discovery is not delivered input. |
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| Unicode delivery | A separate disposable X11/XIM receiver on the device accepted an exact mixed-script Unicode fixture via `set_string` and `commit` after checking focus on its owned window. | One Xwayland receiver, not general games, native Wayland or PC-streamed targets. No Enter was sent. |
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| libei | Sender connected; seat advertised KEYBOARD, not TEXT. | No bound device or delivered key test. |
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| XTEST / uinput | XTEST advertised; `/dev/uinput` was openable by the test account. | No injected XTEST key or virtual device. |
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| Audio | PipeWire input device enumerated. | No microphone recording or model inference in this probe. |
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| Portal | Existing portal introspection exposed no RemoteDesktop, InputCapture, Clipboard, ScreenCast or GlobalShortcuts interface. | Not a guarantee for future OS releases. |
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The Xwayland receiver was destroyed after the test. No packages, services or
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Steam settings were changed. No microphone audio was recorded. This is a
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historical API probe, not a live availability check or install smoke test.
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## Implementation cautions
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Gamescope's [input-method protocol](https://github.com/ValveSoftware/gamescope/blob/3.16.28/protocol/gamescope-input-method.xml)
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is private and version-sensitive; see its [implementation](https://github.com/ValveSoftware/gamescope/blob/3.16.28/src/ime.cpp).
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The serial is not a verified focus-generation guard; a roundtrip is not a text
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consumption acknowledgement. The inspected [`gamescope-type` example](https://github.com/ValveSoftware/gamescope/blob/3.16.28/src/Apps/gamescope_type.c)
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interprets newline as Submit: do not use it as a transcript pipe.
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Generic virtual-keyboard and data-control Wayland globals were not advertised
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in this probe. Focus tracking and Steam keyboard coexistence need separate tests.
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The proposed Redux model is pinned to revision
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`fad622f25f303105c20d70e201bcc477c88b620c`; the weight file was
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177,774,490 bytes in an earlier local inspection. ARM64 Python 3.12 wheels
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appeared available, but no native model load or inference was performed on the
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Frame. Runtime redistribution terms require separate review.
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