PAX A920 Kernel Log Access Diagnostic Report - Solar Faults | terminalfaults.org

Technical Background:

Accessing kernel logs typically requires ADB (Android Debug Bridge) over USB or network connection. Android System Recovery provides limited shell access. Kernel logs contain debug information relevant to system operation, including hardware interactions and driver issues. Unauthorized kernel access attempts can trigger PCI-PTS security measures.

Symptoms:

User reports needing kernel log access from Android System Recovery on the PAX A920.

Possible Causes:

Attempting kernel access without proper authorization or root privileges.
Damaged or incompatible USB cable preventing ADB connection.
Incorrect ADB configuration on the host computer.
Disabled ADB debugging in developer options (if accessible).
Corrupted Android System Recovery image.
Kernel logs not being written to persistent storage.

Solution:

1

Safe Handling: Disconnect the PAX A920 from power. Ensure the device is on a dry, static-free surface.
2

Attempt ADB connection via USB: Connect the PAX A920 to a computer with ADB installed and configured.
3

Verify ADB device recognition: Use 'adb devices' command on the host computer to check if the device is detected.
4

If ADB is functional, attempt to pull the logs using 'adb pull /proc/kmsg' or similar kernel log location.
5

If ADB is not functional, check USB cable integrity. Use a known good, high-quality USB data cable.
6

Check device settings (if accessible): Navigate to 'Settings' -> 'Developer options' and ensure 'USB debugging' is enabled. Note: Access may be restricted.
7

If ADB and device settings are inaccessible, contact PAX support or authorized service provider. DO NOT attempt to open or modify the device.

Safety Warning:

Opening the PAX A920 will trigger anti-tamper mechanisms, rendering the device permanently unusable and voiding any warranty. Do not attempt to disassemble, modify, or repair the device internally. Incorrect USB cable insertion can damage the USB port. Static discharge can damage electronic components. Handle with care.

Prevention:

Regularly inspect USB cables for damage and replace them when necessary. Avoid excessive bending or strain on cables connected to the device. Maintain a clean and dry environment to prevent short circuits or corrosion. Clear any dust buildup on connectors using compressed air. Apply a high-quality screen protector to mitigate touch-screen damage.

Expert Tip:

Some devices allow log retrieval via network connection (e.g., SSH) after enabling ADB over WiFi. Check for specific key combinations during boot that might enable diagnostic mode, but be aware that this could trigger security protocols.

Frequently Asked Questions

•Where are the kernel logs located in the file system?

Kernel logs are typically located in '/proc/kmsg' or '/dev/kmsg'. However, access may be restricted based on security configurations.

•What is the default baud rate for the serial console?

PAX A920's serial console baud rate is typically 115200. Access requires specific hardware and is discouraged due to potential security risks.

•Can I use fastboot to flash a custom recovery image?

No. Flashing a custom recovery image is prohibited due to PCI-PTS security measures and will likely brick the device.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where are the kernel logs located in the file system?

•What is the default baud rate for the serial console?

•Can I use fastboot to flash a custom recovery image?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: