Internal Keyboard is Intermittently Unresponsive After a Cold Boot or Returning From Hibernate

Summary: Information about an unresponsive keyboard after a cold Windows 11 boot-up or returning from S4 Hibernation.

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Symptoms

Note: A cold boot up means that the system is powered off and then powered on to boot up. A warm boot up is when the system is already powered on and rebooted.

When the system does a cold Windows 11 boot-up or returns from S4 hibernate, the internal keyboard may not function intermittently. The touchpad or an external keyboard works fine.

Affected System:

  • Dell 14 Plus DB14255

Cause

When resuming from Hibernate or booting up with Windows Fast Startup, the BIOS sends a "keyboard enabled" command through I/O port 6064. This affects the Operating System (OS) initialization, making the EC think the keyboard is disabled.

Resolution

BIOS Update

To resolve this issue, update to BIOS version 1.2.0 or newer:


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Affected Products

Dell 14 Plus DB14255
Article Properties
Article Number: 000337255
Article Type: Solution
Last Modified: 15 Sept 2025
Version:  2
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