Number of displayed serial ports is less than the number of installed serial ports
Complete the following steps until the problem is solved.
1. Make sure that:
• Each port is assigned a unique address in the Setup utility and none of the serial ports is disabled.
• The serial-port adapter (if one is present) is seated correctly.
2. Reseat the serial port adapter.
3. Replace the serial port adapter.
Serial device does not work
1. Make sure that:
• The device is compatible with the server.
• The serial port is enabled and is assigned a unique address.
• The device is connected to the correct connector (see
“System-board-assembly connectors” on
page 32
).
2. To enable the serial port module on Linux or Microsoft Windows, do one of the followings according to
the installed operating system:
Note: If the Serial over LAN (SOL) or Emergency Management Services (EMS) feature is enabled, the
serial port will be hidden on Linux and Microsoft Windows. Therefore, it is required to disable SOL and
EMS to use the serial port on operating systems for serial devices.
• For Linux:
Open the ipmitool and enter the following command to disable the Serial over LAN (SOL) feature:
-I lanplus -H IP -U USERID -P PASSW0RD sol deactivate
• For Microsoft Windows:
a. Open the ipmitool and enter the following command to disable the SOL feature:
-I lanplus -H IP -U USERID -P PASSW0RD sol deactivate
b. Open Windows PowerShell and enter the following command to disable the Emergency
Management Services (EMS) feature:
Bcdedit /ems off
c. Restart the server to ensure that the EMS setting takes effect.
3. Reseat the following components:
a. Failing serial device.
b. Serial cable.
4. Replace the following components:
a. Failing serial device.
b. Serial cable.
5. (Trained technician only) Replace the system board.
Software problems
Use this information to solve software problems.
1. To determine whether the problem is caused by the software, make sure that:
• The server has the minimum memory that is needed to use the software. For memory requirements,
see the information that comes with the software.
Chapter 7. Problem determination 331
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