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My PS/2 mouse doesn't behave properly under X Window. Frequently Asked Questions for FreeBSD 2.X : Miscellaneous Questions : My PS/2 mouse doesn't behave properly under X Window.
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6.29. My PS/2 mouse doesn't behave properly under X Window.

Your mouse and the mouse driver have somewhat become out of synchronization. Switching away from X to a virtual terminal and getting back to X again may make them re-synchronized. If the problem occurs often, you may add the following option in your kernel configuration file and recompile it.

            options PSM_CHECKSYNC
          

See the section on building a kernel if you've no experience with building kernels.

With this option, there should be less chance of synchronization problem between the mouse and the driver. If, however, you still see the problem, click any mouse button while holding the mouse still to re-synchronize the mouse and the driver.

Note that unfortunately this option may not work with all the systems and voids the ``tap'' feature of the ALPS GlidePoint device attached to the PS/2 mouse port.


Frequently Asked Questions for FreeBSD 2.X : Miscellaneous Questions : My PS/2 mouse doesn't behave properly under X Window.
Previous: How are Plug N Play ISA cards detected and initialised?
Next: Kernel Configuration