Serial port problems
- Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
- If an action step is preceded by '(Trained technician only)', that step must be performed only by a Trained technician.
- Go to the IBM support website at the Lenovo Support Portal to check for technical information, hints, tips, and new device drivers or to submit a request for information.
Symptom | Action |
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The number of serial ports that are identified by the operating system is less than the number of installed serial ports. |
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A serial device does not work. |
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The serial port might print out some messages for debugging purposes during the uEFI and pDSA configuration stages. Some external devices when attached on the serial port can cause specific device-related behaviors. |
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