Field report (Windows laptop, lid closed, Tailscale): v0.12.0's activation
fix works — the pf-vdisplay target activates in ~200ms — but the session
still dies at the first-frame gate: 'driver_status=1 but no frame published
within 4s'. Triage showed three independent blind spots; this names all of
them at their source instead of guessing downstream:
- pf-win-display: decode ChangeDisplaySettingsExW failures (-1 FAILED — a
display write rejected, the wrong/remote-session signature — vs -2 BADMODE,
which the old 'mode not advertised?' text conflated), and WARN on every
non-zero SetDisplayConfig rc in the CCD isolate even when verification
passes vacuously (the lid-closed case: nothing else active, so the INFO
swallowed rc=0x5 ERROR_ACCESS_DENIED while the load-bearing COMMIT_MODES →
ASSIGN_SWAPCHAIN re-commit silently never applied). Access-denied rcs get
the remedy appended (console session / installed service).
- host: console-session guard (interactive::console_session_mismatch) — a
host outside the active console session (a hand-launched host after an RDP
round-trip) fails every display write, reads the wrong session's GDI view,
and its SendInput compose kicks go nowhere. Named ERROR at vdisplay
acquire + appended to the first-frame timeout, instead of the misleading
generic failure. (The idd_push diagnosis half of this landed in 9a36ea21;
this commit adds the proto helpers + session guard it references, healing
the windows-cfg build.)
- proto + driver: while OPENED, driver_status_detail now carries a live
packed word (bit31 live-marker | offered 15-bit | mismatch-dropped 16-bit)
maintained by the publisher, so the host's first-frame timeout can tell
apart: never-attached (no swap-chain worker ran), attached-but-DWM-composed-
zero-frames (undamaged/powered-off desktop, kicks blocked on the secure
desktop), and composed-but-every-frame-mismatched (ring sized from a stale/
foreign-session GDI mode). Zero layout change, old drivers read as 'no
detail'; unit-tested pack/unpack in pf-driver-proto.
Verified on winbox: cargo check + clippy -p punktfunk-host -p pf-win-display
-p pf-driver-proto EXIT 0, drivers ws cargo check -p pf-vdisplay EXIT 0
(Version_Number=10.0.26100.0), cargo fmt --all --check clean; pf-driver-proto
tests 13/13 pass locally.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler
3d9b329084