I had to do the following upon installing previous Mate versions to be able to use wifi:
sudo apt-get install git dkms build-essential
git clone https://github.com/tomaspinho/rtl8821ce.git
cd rtl8821ce
sudo ./dkms-install.sh
This worked on the previous 18.04.3 LTS (Bionic) stable release but does not appear to work on 19.10 (Eoan) - I am a noob but I don't see why it wouldn't, can anyone help me out please? I'm not doing anything different and secure boot is off. I don't really want to be tethered to ethernet to be able to use the internet:(
Thank you