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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16:35:50.248 B7C c7r: uartlog PID 31902 -> logs/uart/b7c7r-20261002-193550.log; waiting for fastboot <EMMC_SERIAL> (power off >= 90 s, then RESET held + battery -> USB)
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16:35:50.252 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: 1.169s
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rc=0
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16:36:01.437 NCM ping 172.16.42.1 ok
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16:36:01.439 PM8916 RTC at Linux boot = 34 s -> class A (A = PMIC POR; <40 s allows for the lk fastboot wait)
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16:38:19.558 controller end: [131.59] === START OK in 122.2s (wwan0 10.39.38.118/30, routes: 10.10.22.1 194.186.191.1 77.88.8.8 1.1.1.1 )
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16:38:27.574 sntp: [147.01] SNTP check ( 89.109.251.21 89.109.251.22 89.109.251.23): 14 replies; best offset delay server: +0.842653 0.057825 89.109.251.21: (offset > 0 = clock behind)
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16:38:58.584 snapshot: 2 end markers
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f075c51dda61099818ac6e1086b1e9e8439a2adc0f564fc2a0f4b590d5e75512 logs/b7/b7c/c7r/run-aurora-modem.tar
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16:39:03.631 B7C c7r END
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