| Event Id | 28 |
| Source | 8042prt |
| Description | Could not successfully write the Controller Command Byte for the i8042. |
| Event Information | CAUSE:
The Windows NT initialization routine reads the Controller Command Byte (CCB) from the i8042prt, changes some CCB bits, writes it back, then verifies it. If the verification does not pass, the error is posted in the System Log. The keyboard driver also logs this error when it encounters glitches in operation.
This is by design and a valuable tool to determine problems when the keyboard actually stops working.
RESOLUTION: This is an informational message only and not an indication of a problem with the keyboard port. |
| Reference Links | Event ID 28 from 8042prt on IBM PS/2 and Some PC Servers |
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