Two concurrent Windows sessions both drive the same pf-vdisplay monitor's
single-capturer IDD-push channel (newest-delivery-wins), which freezes the live
client and can wedge the driver (observed live: a concurrent-session test wedged
.173 → Moonlight 'no video'; needed a reboot). True multi-session capture is §6.6/
Stage 7. So on Windows 'separate' (incl. the unconfigured default) now resolves to
REJECT — a 2nd client gets a clean 503 and the live session is protected — instead
of join (which would freeze it). join/steal stay explicit opt-ins; Linux keeps
separate (real multi-view). Centralized as admission::effective_conflict(), shared
by the native handshake + GameStream h_launch.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
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