Changing xorg.conf InputDevice section to this, the back button worked fine (in firefox):
Section "InputDevice" Identifier "Configured Mouse" Driver "mouse" Option "CorePointer" Option "Device" "/dev/input/mice" Option "Protocol" "ExplorerPS/2" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" Option "Buttons" "8" Option "ButtonMapping" "1 2 3 8 6 7" EndSection Now, only the horizontal scroll don't work. -- Extras buttons of Microsoft Comfort Optical Mouse 3000 doesn't work. https://launchpad.net/bugs/52288 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs