# R3A — autonomous cold boot → LTE: **PASS**

2026-10-02. One clean run. CH340 TX→RX disconnected, UART read-only, no fastboot, no manual commands until `START OK`.
Power-off ~11:54 (≥ 90 s, ~2 min), on 11:56 battery → USB.

## Class
PM8916 RTC at boot = **3 s** (`setting system clock to … (3)`) → **class A** (full PMIC reset). SBL1 pm_device_init Δ 11254 µs, pm_driver_init Δ 10522 µs (class A range).

## Timeline (host clock / board uptime)
| Step | Time | Evidence |
|---|---|---|
| SBL1 Start | 11:56:14 (UART buffered) | r3a-uart-markers.txt |
| lk eMMC | `MMC card: H4G2a`, HS200, `Done initialization of the card` | no CMD2/CID error |
| lk | `Trying to boot 't4'` | |
| Linux | 7.2.7-aurora-bam1; `EMMC-RO-SUMMARY devices=30 all_ro=YES` | |
| NCM up / telnetd | uptime 6.99 / 7.01 s; host first ping OK **11:56:26.97** | no ping loss after that (139 OK) |
| B1_OK=1, aurora-modem start | uptime 9.15 s | |
| MSS running / QMI / SIM | 9.92 / 12.97 / 13.04 s | 3× DeviceNotReady on online SET — expected, retried by design |
| DMS online | 16.30 s | |
| Registered Beeline 250-99, PS attached | 23.25 s (7.0 s after online) | PCI 55, TAC <CELL>, EARFCN 1275, RSRP −99, RSRQ −15 |
| MM modem detected | 64.08 s (40.3 s after MM start) | slowest step |
| Bearer connected | 75.18 s; **START OK in 66.0 s** at 11:57:31.5 | service rc=0 |

Power-on → working LTE ≈ **77 s**.

## State after boot (telnet, read-only)
- usb0 172.16.42.1/24, route to 172.16.42.2 via usb0; telnetd pid 615.
- controller `BEARER_CONNECTED`; MM: connected, lte, home, Beeline, signal 67 %.
- wwan0 10.41.212.24/28 gw .25, MTU 1500; DNS 10.10.22.3, 194.186.191.1.
- Routes via wwan0: /32 to 77.88.8.8, 1.1.1.1, both DNS (no default route — by design).
- ping -I wwan0 77.88.8.8 3/3 (~56 ms), 1.1.1.1 3/3 (~51 ms).
- DNS: 10.10.22.3 resolves ya.ru (A + AAAA); **194.186.191.1 timed out** (secondary DNS — note, not a criterion fail).
- lifecycle FAIL/rollback/lost count = 0; dmesg-errs 0; rmtfs writes 0; eMMC writes 0.
- /etc/resolv.conf absent (controller does not write it).

## Notes (not failures)
- lk `MMC card failed to respond, try for SD card` at [100] — second SDHC (SD slot) probe after eMMC is done; present on normal boots.
- Board clock 1970 (not set) — HTTPS not tested in R3A.

## Files
r3a-meta.txt, r3a-uart.log (copy of logs/uart/r3a-20261002-115402.log), r3a-uart-markers.txt, r3a-host-ping.txt,
r3a-nm.txt, r3a-snap.cmds, r3a-telnet-snapshot.txt, host-ping-observer.sh.