Files
punktfunk/packaging/windows/drivers
enricobuehlerandClaude Fable 5 5742ec9548
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fix(vdisplay/driver): the audit bundle — one timing formula, honest EDID, scoped watchdog, lock-free drain, D0-resume re-init, knobbed RT priority
One signing pass over the 2026-07-30 audit findings:

- Timing math unified (D4): monitor-description and target modes now come
  from ONE IddSampleDriver-exact builder differing only in
  vSyncFreqDivider; the virtual-display-rs legacy formula (width-less
  pixel rate, deliberately fractional vSync) is gone.
- EDID (D5): the preferred-timing DTD is built from the SESSION's mode
  when it fits the encoding (pf-driver-proto's tested builder; 1080p60
  stays the fallback); the range-limits descriptor covers everything the
  driver can advertise (max clock 150 MHz → 2550 MHz, max-H +255 —
  the old limits were violated by the driver's own 1080p120 default);
  product code 0 → 1. Deliberately still no HDMI VSDB — documented in
  the module doc.
- INF (D6): UmdfFileObjectPolicy=AllowNullAndUnknownFileObjects added
  (the sibling drivers all carry it); the dead DeviceGroupId (inert under
  ProcessSharingDisabled) dropped; the IddCx0102-vs-
  IddMinimumVersionRequired=10 pairing documented as deliberate — 0102
  is the extension's registered identity, not a version request.
- Watchdog lifecycle (D7): device cleanup now stops the host-liveness
  thread (it ran forever and its reap raced device teardown over the
  same monitor list).
- Drain path off the mutex (D8): the per-frame has/take_frame_channel
  checks (≥60 locks/s per worker on the mutex the whole control plane,
  the mode DDIs and the watchdog contend) are gated by a delivery
  generation counter — the steady state takes no lock.
- Adapter cache (D9): last-write-wins slot instead of a OnceLock, and a
  D0 re-entry from a REAL low-power state clears + re-inits — the stale
  pre-power-cycle handle used to wedge every later IOCTL_ADD.
- Realtime GPU priority (D10): IddCxSetRealtimeGPUPriority is now
  A/B-able without a rebuild (PFVD_NO_RT_GPU, machine env) — no
  canonical IDD driver raises it, and it preempts the game's and DWM's
  queues at a level apps can't reach.
- Logging (D2): the logger rides file_log_enabled() as a whole — a
  RELEASE driver without the opt-in no longer OutputDebugStringA's (+2
  allocs) per logged event.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-30 23:35:32 +02:00
..
2026-06-30 10:12:45 +02:00