My mouse wheel has stopped working. It doesn't scroll up and down when previously it worked. How can I configure what each button of the mouse does?
You can check if your hardware is defect by running
When testing this, please ignore the output that is generated by your mouse moving around.
If you know your mouse isn't broken, and xev still doesn't give you any indication of the scroll wheel - if for example the mouse works on another computer, you are experiening a bug. In this case, read the Ubuntu Wiki's article on how to report bugs and file it against X.org. Make sure to include all details in your bug report, plus how to reproduce the error.
Be absolutely certain that your mouse works before filing a bug.
You can use btnx to re-assign your mouse buttons. This will only work if they are detected properly.
The program will ask you to go through each of your buttons to configure them. Note: If