Solaar is a Linux device manager for Logitech's Unifying Receiver peripherals. It is able to pair/unpair devices to the receiver, and for most devices read battery status.
1.get the latest code from github
git clone https://github.com/pwr/Solaar.git
2.Install with your terminal
If you got some errors, that means you may need to install some dependence packages by yourself,go with APT INSTALL.
3.fix accessible problem
Normally USB devices are not accessible for r/w by regular users, so you will need to do a one-time udev rule installation to allow access to the Logitech Unifying Receiver.
4.Then unplug your Unifying Receiver and Plugin again,run solaar from launcher and enjoy
Yeah,MX Master is supported now.