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TITLE

6a. Fix for erratic ('jumping') mouse behavior when the GPS is connected

Created: 12/05/2003
Modified: 07/05/2011

TOPIC

GPS Troubleshooting


DISCUSSION

A Windows bug has been discovered by Microsoft where Windows detects a connected GPS as a mouse--this produces a jumping cursor problem. The following are the directions supplied by Microsoft support to correct the problem:

1. Turn off the GPS and close Maptech Navigator Software.

2. Right-click on the My Computer icon and select Properties.

3. Select the Hardware tab, and click the Device Manager button.

4. Next to "Mice and other pointing devices," click the plus button to expand this list. You should see at least two items listed. One is the mouse you normally use, and the other will probably be listed as "Microsoft Serial Ball Point."

5. Highlight "Microsoft Serial Ball Point" and click the Disable button at the top of the window (it is usually the second button from the right; hover the cursor over it and read the ToolTip to verify).

6. In the confirmation message window that appears, click Yes.

7. Close the Device Manager.

8. Plug in/turn on your GPS.

9. Restart Maptech Navigator Software.

If these steps do not correct the issue, please contact the computer manufacturer for more troubleshooting assistance.



If you have a USB GPS (that gains power through the USB port), such as the Zenstar III or the iGPS,
the above steps will not work.

Please follow these steps instead:

With the GPS unplugged,

1. Click on start

2. In the search box, type in " regedit "

3. Registry Editor windows opens

4. Navigate to the location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sermouse

Locate the HKEY_LOCAL_MACHINE folder on the left.
- hit the plus ( + ) sign or the triangle to the left of the folder.

Locate the SYSTEM folder on the left.
- hit the plus ( + ) sign or the triangle to the left of the folder.

Locate the CurrentControlSet folder on the left.
- hit the plus ( + ) sign or the triangle to the left of the folder.

Locate the Services folder on the left.
- hit the plus ( + ) sign or the triangle to the left of the folder.

Locate the sermouse folder on the left., and click on the folder.

5. On the right hand side you would find start

6. Right click on the key start and select modify
Modify the value of the key to: 00000004
(or from a 3 to a 4)


If you do not find the Start key then follow the below steps:

1. Right click on the blank space

2. Select on the option New

3. Click on dword 32-bit value

4. Rename it to start

5. Right click on the key and select and modify

6. Feed in the value: 00000004

7. Restart the computer


Now connect GPS through USB port, or with the serial USB adapter,
and check the results.



For More Information
Please see this Knowledge Base article on Microsoft.com:
http://support.microsoft.com/kb/819036/en-us

http://answers.microsoft.com - recognized-usb-gps-as-a-serial-mouse