I just bought a new mouse. It is a nice Logitech MX900: very comfortable, and wireless (since the wire was the point of failure from my previous mouse). I was wondering whether it would work fine under Linux. Actually, it works better than expected.
When I plugged the mouse (actually, the base), it was automatically discovered and working fine. Even the wheel was behaving like expected. All this thanks to evdev: In the past, we had to use xmodmap or the ButtonMapping option in /etc/X11/xorg.conf.
However, my thumb buttons were not working. I like when thumb1 acts as a « backward » button in firefox and thumb2 as a « forward » button — that really ease navigation, I think. Once again, a nice documentation came from Gentoo.
But to make a long story short, the only thing I had to do was configure /etc/X11/imwheel/imwheelrc as follow
".*"
None, Thumb1, Alt_L|Left
None, Thumb2, Alt_L|Right
And run imwheel — and not forget to publish this post before pressing thumb1 
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