keydriver problem after install HP L.P. Keyboard 11.1.9.1

[ErikvdW]

In Bios keyboard is working so technical keyboard is working ok. But after login not any key is working only touchpad is working.

I have read suggestion about registry key of i8042prt start set to 1 instead of 3, but still trouble is there.

I have done alle the updates include bios update but trouble is still there.

Finally I change 2 bios settings:

1) Startup menu delay (sec) from 0 to 5

2) NumLock on at boot from off to on

Problem is gone.

But the real problem is in the driver itself I would see. So hopefully there will become an update which can fix this issue.

I have seen this trouble at more than 1 hp models

[BongChaGomez]

Hello @ErikvdW ,

Welcome to HP Support Community.

You’re absolutely right — what you described is a real, reproducible driver/firmware interaction bug, not a hardware failure, and your findings are technically sound. 👍

Thank you for documenting the workaround so clearly.

• This requires HP driver + firmware coordination

• Older models like 820 G3 are not guaranteed a fix

• HP often treats this as “working as designed” if a BIOS workaround exists

Your workaround is effectively what HP support would suggest internally.

Have an amazing day ahead!