Cannot control connected HDMI laptop with All in One Mouse and Keyboard

[JRS007]

I purchased this All in One because it was one of a few that had an inbuilt HDMI-In port.

I use the All in One for my own home business, but there are times when I also need to use the screen to connect a work issued laptop which I must use for a different (part-time) job.

I am fairly sure (unless I'm going mad) that the previous work laptop worked fine. I simply connected it with the HDMI cable to the HDMI-in port on the PC and then everything worked fine - effectively the screen was just an extension of the laptop, and I could easily switch between the laptop and the PC using the switch shortcut (Ctrl+Shift+S+D).

I have recently been given a new laptop from work.  It is the same but a slightly newer version of what I had before - a Lenovo Thinkpad X1.

Now when I connect the laptop to the All in One using the HDMI cable, I can still see the laptop screen and switch between laptop and PC using the shortcut, however once the active port is the HDMI port, I can no longer control it using the All in One Keyboard and Mouse (wireless).

I now have to attach a different keyboard and mouse to the laptop and use that, which kind of defeats the whole "clean" look of everything and is a real hassle when I switch between the laptop and the PC.

Any advice?  I feel like the All in One should be able to control the laptop when it's properly connected?  Am I doing something wrong??   Have asked HP but they aren't much help (or haven't' been so far).

[banhien]

@JRS007 

No, you can not use AIO keyboard to control your notebook. Wen connecting your notebook to AIO screen, AIO screen acts as a normal external monitor, you have to control your notebook using keyboard ON or connected to notebook

Hope this makes sense.

Regards.