8d7721c775
B7A: QMI DMS time vs VNIIFTRI NTP (DMS = UTC - 0.28 s, sigma 1 ms; NITZ = DMS truncated to 1 s). B7B: a 1970 -> 2026 date -s step is harmless for the modem stack. B7C: aurora-modem probes DMS/NITZ along the start flow and steps CLOCK_REALTIME once at the first valid sample (REG registered/attached), never RTC; background SNTP check (query only) after START OK. 3/3 class-A cold boots PASS (residual +0.04/+0.36/+0.84 s), cache 14fe453a written (B7C_WRITE_VERIFIED) and verified by a normal power-on (V1, +0.26 s). Also publishes the prerequisite R2 (boot-hang / lk eMMC investigation, T4 telnet baseline that B7C builds on) and R3 (autonomous cold boot, NCM loss) material, and extends tools/publish-sanitize.py to r2/, r3/, b7/. Binary images, initramfs, busybox and raw logs stay out (see b7/*/SHA256SUMS).
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b7/b7c/out/aurora-mm1-b7c.img: OK
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10:10:05.514 B7C c1: uartlog PID 26459 -> logs/uart/b7c1-20261002-131005.log; waiting for fastboot <EMMC_SERIAL> (power off >= 90 s, then RESET held + battery -> USB)
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10:10:05.526 fastboot device present
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Sending 'boot.img' (20792 KB) OKAY [ 0.656s]
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Booting OKAY [ 0.494s]
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Finished. Total time: 1.172s
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rc=0
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10:10:16.715 NCM ping 172.16.42.1 ok
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10:10:24.730 controller end: ~ # [6ngrep -E "START OK|FAIL in|rollback" /run/aurora-modem/lifecycle.log | tail -
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10:10:32.744 sntp: ~ # [6ngrep -E "SNTP (check|STEP|: )" /run/aurora-modem/lifecycle.log | tail -2
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10:11:03.754 snapshot: 2 end markers
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dd6d5786b0a197c8d22e715404dfea4ec3c0e40881979595c825883cad633e29 logs/b7/b7c/c1/run-aurora-modem.tar
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10:11:08.796 B7C c1 END
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