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87149a37-eca8-4b6d-89b3-624886491564["c7316fa2bf556672861d7d380c88262c","b73a828ec789735446c00af9f9cc4677","d8a41fdecc60cc4908814362f365e358","77814e85c0fc186f9ac6bd773f9416af","2c85cb75fc8b123f4fa952ce6a6527e4","19bcf63072c63ab120b0ccf94ef6e341","9abeef3613533b209df9bd130ed6f8fb","b037bef0c8874c41835042cc3473b886"]
AVR: probe -> ON (resp=41565241434b0202b24a), is_on() returned True, RESULT: AVR DETECTED ON — first successful probe in entire investigation/jffs/pl2303-gnuton.ko, device node type=c (char device)chromecast_avr_bridge.py is_on() method (lines 213–255 of 813): sends VOL UP (side-effect-free after OSD timeout), checks for b"AVRACK" in response; returns True (on), False (standby), or None (comms failure); drains stale serial buffer before sending; handles proc.poll() is not None → reads stderr, logs rc + stderr[:200], returns Noneproc.poll() is non-None → logs stderr "ERROR: ... is not a char device" → is_on() returns None → never kills the stream