From owner-freebsd-questions@FreeBSD.ORG  Thu Apr 19 21:25:56 2012
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Date: Thu, 19 Apr 2012 14:25:48 -0700
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From: "Ronald F. Guilmette" <rfg@tristatelogic.com>
Subject: Changing psm (mouse) resolution?
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The man page for the psm driver says:

    ... The current resolution can be changed at runtime.

Unfortunately, it fails to mention any sort of command line utility
that would provide this functionality.

Is there a command line utility that provides this functionality?  Or do
I need to write one from scratch, using the ioctl calls that are documented
in the man page?