xserver-xorg-input-mouse - 1:1.9.3-1+b1 main

This package provides the driver for mouse input devices. It is mainly used
on non-Linux operating systems such as BSD and Solaris. Most
configurations on Linux will use evdev, the kernel's event delivery
mechanism, and do not need this package.
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See the inputattach package if your mouse is not automatically
detected by the Linux kernel, for example because it is a serial mouse.
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More information about X.Org can be found at:

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This package is built from the X.org xf86-input-mouse driver module.