Cooler Master Masterkeys Pro M (White LED)

I noticed this issue while playing with my new keyboard. I have reported to the retailer I bought it from and also emailed CoolerMaster (

Steps to reproduce.
  1. Take a laptop running Windows 10. Please make sure that the account is protected by password and password is asked when waking up from sleep.
  2. Connect the Cooler Master Masterkeys Pro M keyboard
  3. Make sure the keyboard is properly working with the laptop.
  4. Put the laptop to standby/sleep.
  5. Wake up the laptop by pressing any of the letters key (A-Z) on the keyboard. This happens with other keys as well, such as Ctrl key but it is hard to show effect of that on login screen.
  6. In the password prompt, (if the keyboard has issue) you'll see that some characters being typed continuously, as dots. 
  7. If you see those dots, you can click on the 'eye' like icon to view that it is the same character as the one you pressed to wake up the computer from sleep.
I made a small video about this issue as well. You can watch video here.

Update: I received replacement unit from (Thank you), however it also has the same issue. Looks like firmware issue or someone didn't had enough test-cases.


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