**Rioter that was servicing my support ticket did some digging, and mouse button 5 is no longer natively support. I am assuming this is a bug (s/he didn't specify. S/he did say that there is no current time-line to fix the problem**
I own a Logitech G9X (Multi button mouse). I set up the mouse correctly using SetPoint (the software provided by Logitech).
My Mouse Button 5 is no longer able to be bound. It worked just fine before the last patch.
I have tried listing each button as Generic Button and as a Listed Button [1, 2, 3, 4, 5]. In game, Button 1 through 4 work correctly and can be bound in the key-binding menu. However, Button 5 is not binding. I have tested the functionality of button 5 by assigning it a different button number and can conclude that it is fully functional.
I have also tried using the League of Legends repair tool.
A support document in the Support Knowledge Base specifically states:
|"At this time mouse buttons beyond 'Mouse 5' are not detected by our game and cannot be bound through the in-game options or by adjusting the input.ini file."|
I read this to mean that Mouse Button 5 should be supported however a 6th would not work.
Why am I not able to bind this button? Is this a bug and if so, does the Riot team know about it? Any insight that you can offer would be much appreciated.
TL;DR -- I used to be able to bind my Mouse Button 5, after this patch I cannot. Is this a known bug? Please can it be fixed? I have tried adjusting my mouse settings as well as using the League of Legends repair tool.
Edit [response from red]
Some mouse programs allow you to bind mouse buttons to different keys. You may check that out. Also it may actually be a different button binding then you expect.
Anyway what also may be helpful is modifying the input.ini file directly.
Here is a guide:
Here is more keys than they have listed:
Could you comment on whether or not this is a bug?