[time-nuts] USB and Mouse conflict persists
Stan, W1LE
stanw1le at verizon.net
Thu May 12 12:24:28 UTC 2011
Hello Joop,
Thanks for the pointer.
I am slowly achieving the confidence to tackle my XP Pro registry.
Stan, W1LE
On 5/12/2011 4:12 AM, Joop wrote:
> quote: [On the tab "Port Settings" click "Advanced" and in that window
> uncheck the
> box next to "Serial Enumerator"]
> This is a feature of the FTDI driver. Not something generic.
>
> What worked for me was to disable (postpone actually) the Windows PnP
> device enumerator for a serial device. It works for hardware serial
> ports as well as the USBtoRS232 converters.
> This can be done with a registry patch which adds the
> "Skipenumerations" registry entry. Setting this to a big value skips
> the possible detection of any device (such as a serial mouse) on a COM
> port.
> Search the net for details. E.g. here :
> http://support.microsoft.com/default.aspx?scid=kb;en-us;283063
>
> Lots of the USBtoRS232 converters do not contain EEPROM to store a
> unique serial number. Without it Windows cannot be sure you unplugged
> the same device as you re-plugged in another USB port. Its behaviour
> is to assign it a new COM port number. Re-plugging the converter in
> the original USB port should bring back the same COM port number.
> You will need to patch the registry again if a new COM port number is
> assigned. If you want to avoid this, look for USBtoRS232 converters
> that have the option to program a USB serial number (like the FTDI
> FT232R based ones)
>
> Joop - pe1cqp
>
>
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