LockedHint was never set on this device, so sessiond's `locked` (which
comes from logind per doctrine §4) was permanently false, request_blank()
timed out LOCK_ACK_BUDGET on every blank, and the panel went dark on a
session nobody could confirm was locked. LOCK-DPMS-LESSONS §1 held in the
code and not on the glass — every blank recorded blank-without-lock.
Three faults, measured 2026-08-02:
- Session.qml wrote the hint through /session/auto, which is the caller's
own session. The shell is not in the session that owns the seat:
viewtop in logind 66 (seat0/tty1), qs in 70. Written to one session,
read from another.
- lockhint.rs resolved via User.Display, which an ssh login is enough to
point at a seatless remote session — and which then went stale when
that session ended. Both sides now ask seat0 for its active session.
- The report was dropped outright. hasLoginctl starts false and only
flips when a Process probe returns; secure=true landed 30s earlier, so
the one edge that mattered hit the guard and was never retried, because
the shell locks once at boot and never changes again. Fourth
edge-vs-level bug after locked_ack, ChargeRate and bootBloomActive.
Verified on hardware: LockedHint now goes yes ~2s after a power tap.
94988138b4