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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.

  3. For a USB device:

    1. Make sure that the device is configured correctly.

      Restart the server and press the key according to the on-screen instructions to display the LXPM system setup interface. (For more information, see the “Startup” section in the LXPM documentation compatible with your server at Lenovo XClarity Provisioning Manager portal page.) Then, click System Settings > Devices and I/O Ports > USB Configuration.

    2. Connect the device to another port. If using a USB hub, remove the hub and connect the device directly to the compute node. Make sure that the device is configured correctly for the port.

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).

    To check the POST watchdog time, restart the server and press the key according to the on-screen instructions to display the LXPM system setup interface. (For more information, see the “Startup” section in the LXPM documentation compatible with your server at Lenovo XClarity Provisioning Manager portal page.) Then, click BMC Settings > POST Watchdog Timer.

  2. If the reset occurs after the operating system starts, enter the operating system when the system operates normally and set up operating system kernel dump process (Windows and Linux base operating systems will be using different method). Enter the UEFI setup menus and disable the feature, or disable it with the following OneCli command.

    OneCli.exe config set SystemRecovery.RebootSystemOnNMI Disable --bmcxcc_userid PASSW0RD@xcc_ipaddress

  3. 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.