If you are using a newer version, download Ubuntu Bionic and live boot it. This was tested on a Logitech K400r keyboard/trackpad combo with Logitech Unifying Dongles C-U0007 (FW ver 012.005.00028) You ...

I have always wanted an 84 key standard layout, wireless, mechanical keyboard with RGB backlight and rotary knobs ... intermittently disconnecting every so often. However, Unifying ones are much ...

Logitech K400 Plus is a wireless keyboard using a 2.4GHz dongle, not Bluetooth, which can lead to pairing issues. Troubleshooting steps include switching USB ports, ensuring no other devices are ...