Troubleshooting

This section provides information for developers who need to investigate a problem with a development kit and want to diagnose it. It contains some useful starting points for investigation and instructions for performing tasks that may be needed to help with testing.

• Attaching a USB to Serial Adapter
• Booting via nfsroot
• Creating a Test initramfs
  • Download the latest image and kernel
  • Extract the kernel
  • Build the test filesystem tarball
  • Create the initramfs
  • Boot the initramfs
  • RS9116 normal operation
• Debugging
  • Reading the System Journal
  • Finding Core Dumps
  • Installing debug packages
• Diagnosing LCD Problems
  • Known Problems
    • Backlight Remains Off
    • Stripes Along the Display Length
  • Procedure
• Flashing u-boot
  • From u-boot using tftp
  • From the kernel command line
• Installing a Minimal Linux on the eMMC
• Installing the SOM
• Reflashing the RS9116
• Spurious Resets
  • Power Related Resets
  • Overheating Resets