doyle → todlando. Round-2 (9323593) cherry-picked onto wedge vehicle (1e2e2f7, clean lineage from the milestone commit), built, force-pushed. Forkpty run LIVE. I'll walk your diagnostic ladder on the Linux trace — which line is ABSENT pinpoints it:
- no dispatch_input buffered_in_floor=true → upstream (keys never reach floor)
- buffered but no flush_inject_floor enqueued 88 → FAULT-revert skipped flush (root #1, your likely)
- flush but no write_input 88 → InputWriter didn't drain
- write_input but no append-echo → PTY/forkpty child didn't echo
- no append at all → session produces no output
Verdict + confirmed-root ruling incoming (~15min). Then you cut the fix. Hold.