Q: Bluetooth not working Lenovo laptop - Ubuntu 19.10 (but it did in LiveCD) Edit: The solution in Wifi-Disabled: Ubuntu 19.10 - Intel Wireless 7265 worked for me.
sudo apt install backport-iwlwifi-dkms


I am aware there are lots of other people complaining about this, so there must be something.
I booted my Lenovo Yoga 900 with an Ubuntu 19.10 Live USB and I could connect my Bluetooth mouse without any problem.
I installed the OS and Bluetooth worked no more. The switch ON/OFF moved, but no device discovery appeared to be running.
See the attached images. There is the Intel device firmware, and some commands to show additional info.



