Dell Pro Keyboard and Mouse KM5221W Keys are Repeating
Summary: This article describes what to do when keys in the Dell Pro Keyboard and Mouse KM5221W keyboard start to repeat by themselves.
Symptoms
You may notice with the Dell Pro Keyboard and Mouse KM5221W that the keys in the keyboard start to repeat by themselves.
The issue can happen on any keys. For example, when you are trying to type "English" on the keyboard, it starts to write "EEEEglish" or "Ennnngliiiishhhhh."
The issue is seen when the keyboard has been used for a certain period.
Affected Device:
- Dell Pro Keyboard and Mouse KM5221W
Cause
This is an industry-wide behavior that occurs when a wireless mouse/keyboard receiver dongle is at a close distance to a USB 3.0 port, cable, or device. The 2.4GHz ISM band is a widely used unlicensed radio frequency band for devices such as wireless routers, and wireless mouses or keyboards. USB 3.0 can operate in the 2.4 GHz~2.5 GHz range, and the noise that is emitted can disrupt nearby transmitters. If the wireless mouse/keyboard receiver dongle is placed near a USB 3.0 radiation channel, it can pick up broadband noise. This noise can limit the sensitivity or receptiveness of the wireless receiver. Also, a close-range WiFi router may add a coupling effect. This effect can further strengthen the interference to the wireless mouse/keyboard receiver dongle.
Resolution
Follow the steps to resolve the issue:
- Go to Dell Pro Keyboard and Mouse KM5221W Driver's Page and install Dell Display and Peripheral Manager (DDPM). Ensure that the dongle, keyboard, and mouse firmware are updated automatically in the application
- If DDPM does not update the firmware automatically, update the dongle, keyboard, and mouse firmware manually from Dell Pro Keyboard and Mouse KM5221W Driver's Page.
To download and install the firmware, refer to How to Download and Install Dell Drivers and Firmware.