I must have a blacker googlfu belt
Here is a xorg.conf for a MX500 but the creator stated it should work for most MX logitech mice, if nothing else it looks like a good start for you and you could always tweak it a bit if need be. You should check how your mouses buttons are setup compared to the MX500 and see if anything needs to be changed.
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "Resolution" "800" #optional
Option "Buttons" "10"
Option "ZAxisMapping" "4 5"
Option "ButtonMapping" "1 2 3 6 7"
EndSection
Hope that works for you I felt compelled to try and help since you had been asking for a day without any replies.
Goodluck
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