[time-nuts] GPS Serial Data Causes Mouse Pointer to Move

Jeffrey Pawlan jpawlan at pawlan.com
Wed Apr 13 14:38:06 EDT 2005

A similar problem occurs with earlier Windoz versions (98 and 2000).

ALWAYS start your notebook computer and let it completely boot and login before
connecting anything to the serial port. I found that if there is a GPS connected
to the serial port as it is booting, then Windoz thinks this is a mouse and
ignores the mousepad or the USB mouse and instead the cursor jumps around the
screen as you described. The solution is to shutdown the computer and reboot
without the GPS connected until Windoz is already running. Then the OS already
knows about the mouse and knows that it is not on COM1.


Jeffrey Pawlan, WA6KBL

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