Mouse wheel doesn't scroll after update

Solution 1:

I did not find another progressive solution yet and kernel version 5.0.0-27 solved my mouse scrolling problem (until now without any side effects).

I have an A4Tech X6-80D mouse and the 4.15.0-62 kernel contained this bug, so I installed kernel 5.0 on my Ubuntu 18.04.3 LTS with the commands below (kernel 5.0 is not automatically installed if you have initially an Ubuntu version lower than 18.04.2).

• Desktop edition:

  sudo apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04
  

• I did not try the Server edition, for which xorg is not needed:

  sudo apt-get install --install-recommends linux-generic-hwe-18.04
  

Original source to install kernel 5.0 can be found via How to Get Linux Kernel 5.0 in Ubuntu 18.04 LTS.