Ubuntu – Wireless keyboard not working with Ubuntu 18.04 Live USB

I created a Live USB with Ubunbtu 18.04 on it so I can look into dual booting on a Windows 10 PC.

When I boot Ubuntu from USB, I can't get my wireless keyboards to work. They both work on Windows, so there is no battery issue. They both use a wireless USB dongle. The wireless mouse with one of them works fine.

I used a wired keyboard to install xserver-xorg-input-all using sudo apt-get install xserver-xorg-input-all, but the wireless keyboards still won't work

Is there anything else anyone can suggest that I try ?

Edit:

Output from lsusb is as follows –

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0781:556b SanDisk Corp. 
Bus 001 Device 009: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 007: ID 17ef:60a9 Lenovo 
Bus 001 Device 003: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 006: ID 0bda:0821 Realtek Semiconductor Corp. 
Bus 001 Device 008: ID 046e:550f Behavior Tech. Computer Corp. 
Bus 001 Device 004: ID 046e:5411 Behavior Tech. Computer Corp. 
Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The SanDisk device is the Live Usb and Lenovo is the keyboard/mouse.
The keyboard/mouse are as supplied with the PC and are Lenovo. My alternative set with the same symptoms is by Microsoft.