Skip to main content

Intermittent problems

Use this information to solve intermittent problems.

Intermittent external device problems​

Complete the following steps until the problem is solved.

  1. Update the UEFI and XCC firmware to the latest versions.

  2. Make sure that the correct device drivers are installed. See the manufacturer's website for documentation.

Intermittent KVM problems​

Complete the following steps until the problem is solved.

Video problems:

  1. Make sure that all cables and the console breakout cable are properly connected and secure.
  2. Make sure that the monitor is working properly by testing it on another compute node.
  3. Test the console breakout cable on a working compute node to ensure that it is operating properly. Replace the console breakout cable if it is defective.

Keyboard problems:

Make sure that all cables and the console breakout cable are properly connected and secure.

Mouse problems:

Make sure that all cables and the console breakout cable are properly connected and secure.

Intermittent unexpected reboots​

Note
Some uncorrectable errors require that the server reboot so that it can disable a device, such as a memory DIMM or a processor to allow the machine to boot up properly.

  1. If the reset occurs during POST and the POST watchdog timer is enabled, make sure that sufficient time is allowed in the watchdog timeout value (POST Watchdog Timer).

  2. See the management controller event log to check for an event code that indicates a reboot. See Event logs for information about viewing the event log. If you are using Linux base operating system, then capture all logs back to Lenovo support for further investigation.