Configuring Linux pstore and ramoops to Read Kernel Panic Logs After Reboot
Plan reserved RAM, kernel options and record budgets so a recoverable laboratory reboot can establish what ramoops actually preserves.
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BLE Characteristics Missing After OTA? Check GATT Cache, Service Changed and Bonds
Diagnose missing BLE characteristics after OTA without erasing the evidence: separate cache, subscription, bond and app-state failures.
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Why Is /sys/fs/pstore Empty After Reboot? Troubleshooting Missing ramoops Logs
Trace missing crash evidence through event generation, backend registration, RAM survival, filesystem access and boot-time archiving.
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BLE OTA Compatibility Testing: Older Apps, Bonded Phones and Firmware Rollback
Build a BLE OTA acceptance matrix around real app versions, retained bonds and permitted rollback, with business-level pass criteria.
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Collecting Kernel Crash Evidence from Field Devices: pstore Archives, Build Matching and Redaction
Design a bounded field crash-evidence workflow with early collection, checksummed archives, exact build matching and controlled redaction.
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Serial-to-TCP Gateway Won’t Reconnect? Check Stale Sessions, Buffers and Duplicate Commands
Trace stale sessions, TCP framing, buffer ownership, and unknown command outcomes to verify safe serial-gateway recovery after a disconnect.
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Multiple Clients on One Modbus Gateway: Test Polling Latency and Timeout Isolation
Build a Modbus gateway acceptance plan around serial service time, client deadlines, transaction pairing, and bounded impact from slow devices.
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Priority Inversion in RTOS: Trace Mutex Blocking and Priority Inheritance
Diagnose RTOS priority inversion with task and mutex traces, version-specific inheritance checks, controlled experiments, and deadline-based acceptance.
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Watchdog Resets in RTOS Devices: Preserve Evidence and Find the Stalled Task
Preserve reset flags and task-progress records, understand core-dump limits, and turn an RTOS watchdog reset into a reproducible diagnostic investigation.
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When Should an RTOS Feed the Watchdog? Task Health Checks and Fault-Injection Tests
Define task health, control watchdog feed authority, and test missed faults, false resets, safe outputs, and recovery with a fault-injection matrix.
