Mouse Support in XFree86 : OS Support for Mice : FreeBSD
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## 3.3. FreeBSD

FreeBSD supports the `"SysMouse"` protocol which must be specified when the `moused` daemon is running in versions 2.2.1 or later.

FreeBSD versions 2.2.5 or earlier do not support extended PS/2 mouse protocols (`"xxxPS/2"`). Always specify the `"PS/2"` protocol for any PS/2 mouse in these versions regardless of the brand of the mouse.

FreeBSD versions 2.2.6 or later include the kernel-level support for these mice. Specify the `"PS/2"` or `"Auto"` protocol and the X server will automatically make use of the kernel-level support. In fact, you may always specify `"Auto"` to any mouse in these versions unless the mouse is an old serial model which doesn't support PnP.

Mouse Support in XFree86 : OS Support for Mice : FreeBSD
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