Ubuntu – Middle Mouse Button Doesn’t work

I was using a Logitech M510 wireless bluetooth mouse and was experiencing this issue with Ubuntu 18.04. I noticed that xev was not detecting any events for the scroll. To solve my issue, I turned off the mouse and then turned it back on and it worked.

Check if you have xserver-xorg-input-evdev installed on your system:

sudo dpkg -s xserver-xorg-input-evdev

If yes, do:

sudo add-apt-repository ppa:xorg-edgers/ppa  
sudo apt-get update  
sudo apt-get upgrade

If no, do:

sudo add-apt-repository ppa:xorg-edgers/ppa  
sudo apt-get update  
sudo apt-get install xserver-xorg-input-evdev

Reboot.