I hope the title is clear enough.
Hello!
I've started using the evdev driver for my Logitech v220 mouse, which has a wheel that can move horizontally.
The problem is that if I move the wheel to the right, the horizontal scrollbar scrolls to the left, and vice versa.
Using xev, I've found out that:
- vertical scroll up: event 4
- vertical scroll down: event 5
- horizontal scroll left: event 7
- horizontal scroll right: event 6.
However, whatever I set "ZAxisMapping" to, this doens't influence the behaviour of the mouse buttons - that is, the behaviour remains the one I described.
For example, I tried "4 5 7 6" and "4 5 6 7", but horizontal scroll works always the same way.
I even tried "7 6 4 5", but the moving the wheel still caused vertical scrolling.
It seems that ZAxisMapping doesn't work.
Does anybody know what the problem might be?
Thanks!

Try fiddling with the Protocol values (something like IMPS/2 might help, although mine's just a single scroll wheel mouse).
*edit*- Actually nevermind, I just reread your post and I don't see how my suggestion will help. Your mouse wheel does respond, only in opposite directions. Sorry.

But shouldn't ZAxisMapping configure how the mouse wheel events should be used?
I mean, if moving the mouse wheel to the left generates the event 7 and moving it to the right generates the event 6, shouldn't I be able to tell the mouse driver that 7 means "scroll left" and 6 means "scroll right"? Isn't this the reason why ZAxisMapping exist?
Thank you!

It's my understanding that the evdev driver doesn't accept many of the regular xorg options, like ZAxisMapping. Most devices are supposed to "just work" under it.

But searching around, I found this page, and if I'm reading it and some other comments right, it looks like using:
or similar, should give you the effect you want.