Latency plan P0.2/P0.3/P0.5 (design/first-frame-and-resize-latency.md):
- topology settle: the unconditional 1500 ms sleeps after create_monitor's
group-topology apply and re_add's reisolate become a 25 ms poll for the
committed state (active path + active mode == requested), ceiling 1500 ms —
worst case identical, typical case saves ~1.2-1.4 s on every fresh create
AND every mid-stream resize. The experimental pnp_disable_monitors sweep
keeps the full settle as its floor (it reads OTHER displays' active flags,
which the target-scoped wait doesn't verify).
- monitor departure: the fixed 400 ms REMOVE settles (re_add + both preempt
paths) become a 25 ms poll until the target leaves the active CCD set
(2 consecutive absent samples), ceiling 400 ms; the driver-side ghost-reap
ADD retry stays the backstop.
- activation ladder: 200 ms -> 50 ms sampling, same 3 s per-stage ceilings
and the same 3-stage structure.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler
4ed5b88407