Re: USB cable and new hardware detection
- From: "Richard" <richard@xxxxxxxxxx>
- Date: Thu, 14 May 2009 01:41:00 -0400
<gene@xxxxxxxx> wrote in message
news:20090426173201.40fd2e3c.gene@xxxxxxxxxxx
gene@xxxxxxxx wrote:
Let me try that again. The USB ports are on the back of the computer
under my desk, so I've kept the digital camera's USB-to-camera-port
cable hooked up, with no camera attached most of the time. There's no
camera software loaded (with the camera attached, AutoRun comes up).
On computer boot, camera not attached, there's no Found Hardware or
AutoRun notice; it's as if the cable isn't there.
Now, hook to another USB port an extension cable, which is a
male-to-female USB cable, 1 to 2 meters long in my case (Tim, these are
quality cables). I use this type of cable for ease of downloading to
a USB flash drive and as part of low-tech set up for converting VHS
tapes to computer files. Again, no software necessarily associated with
the cable. On computer boot, with the cable ported to the computer and
nothing on the other end, the Found New Hardware Wizard box comes up,
as well as the smaller one in the Tray. I cancel out of both and then
let the Problem Occurred message clear or X it myself. Just to check, I
unplugged the camera cable and attached the extension to that port.
Same Hardware Wizard, etc., on rebooting. Every time.
My questions are 1) Why are there different responses between the two
cables? 2) Is there anything that can be done to stop the Found New
Hardware notice from coming up each time?
Gene
OK, if I understand right, the problem is with either port, with an empty
cable plugged in? But there is no problem after you disconnect the camera
with the cable attached, after the computer has recognized the camera? But
the newly plugged in empty camera cable and other empty extension cables
cause the problem?
Did you look inside the port with flashlight and magnifying glass to insure
that the contacts are not bent together? (No specks of aluminum foil from
candy wrappers bridging contacts? :)
Some battery operated devices have a place to plug in an A/C power adapter,
and inside the side wall of the port there is a micro switch that
disconnects the battery when the plug is inserted. Do your USB ports have an
inner side switch that lets the computer know if something is plugged in? In
my USB ports, (on the front of the computer,) there are 4 electrical
contacts on one side, which make contact with the 4 contacts of the plug;
and there are 2 contacts on the other side of the ports, which apparently
make contact/connection with the metal case of the plug. Wouldn't that serve
the function of a switch, alerting the computer to the fact that something
is plugged in, even though nothing is connected to the other end of the
cable? If that is the case with the 2 contacts, you would need a special
male plug for an extension cable without the normal metal case, but 2
matching contacts and 2 wires inside, connecting to the normal female port
on the other end; and then the 2 contacts would not short together until an
actual device is plugged into the cable.
--Richard
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