Mouse Races and Jumps Across Screen
Article ID: 103332
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT Advanced Server 3.1
- Microsoft Windows NT Workstation 3.1
This article was previously published under Q103332
SYMPTOMS
Your mouse pointer races across the screen in sudden bursts. It is
difficult to control and often goes beyond what you aim for.
CAUSE
You have a serial mouse connected to a port based on the 16550 UART
chip. The port adapter or motherboard uses hardware buffering rather
than software buffering; and, the buffer is turned on. The mouse races
because the hardware buffer is caching mouse movements and releasing
them to the mouse driver in blocks. The mouse driver interprets these
streams of movements as accelerated input and drives the mouse pointer
accordingly.
RESOLUTION
Disable the hardware buffering for the serial port the mouse is
connected to, or choose a different port.
Additional query words: prodnt mouse-rodeo
Keywords: kbhardware KB103332