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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16:25:55.315 B7C c6: uartlog PID 9759 -> logs/uart/b7c6-20261002-192555.log; waiting for fastboot <EMMC_SERIAL> (power off >= 90 s, then RESET held + battery -> USB)
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16:28:15.955 fastboot device present
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Sending 'boot.img' (20792 KB) OKAY [ 0.656s]
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Booting OKAY [ 0.500s]
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Finished. Total time: 1.179s
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rc=0
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16:28:27.152 NCM ping 172.16.42.1 ok
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16:28:27.155 PM8916 RTC at Linux boot = 5 s -> class A (A = PMIC POR; <40 s allows for the lk fastboot wait)
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16:29:45.226 controller end: [75.25] === START OK in 66.0s (wwan0 10.45.213.94/30, routes: 10.10.22.3 194.186.191.1 77.88.8.8 1.1.1.1 )
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16:30:01.252 sntp: [90.65] SNTP check ( 89.109.251.21 89.109.251.22 89.109.251.23): 13 replies; best offset delay server: +0.356030 0.056447 89.109.251.22: (offset > 0 = clock behind)
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16:30:32.261 snapshot: 2 end markers
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f1f6b5b7c0102952a642433b5009ed5024275a98831d4a35372e48fa5206001f logs/b7/b7c/c6/run-aurora-modem.tar
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16:30:37.316 B7C c6 END
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