Are you using a USB->PS/2 adapter? If so, remove it. PS/2 mice have had problems with btnx.
You can try attaching the output of "cat /proc/bus/input/devices" so I can have a look at it.
Are you using a USB->PS/2 adapter? If so, remove it. PS/2 mice have had problems with btnx.
You can try attaching the output of "cat /proc/bus/ input/devices" so I can have a look at it.