[Thinkpad] TP 76x problem with USB pccard
Mon, 13 Oct 2003 11:41:43 -0400
It comes with a mouse port power adaptor. The ZiO!, for example, will not
power up (the little yellow light glows) unless it has the adapter plugged
in. But I just found out an interesting thing. I plugged in a Logitech
laser eye mouse and like everything else it did not work. But as I went
through the steps to remove the card, the mouse lit up and for a whole three
seconds. This was long enough for the computer to recognize the mouse as a
human interface device. It correctly identified it as an optical mouse and
installed the drivers. Unfortunately, the USB services were no longer
available by the time the mouse was installed.
So, from this, I have determined that the card is allowed to communicate
between the time I request the card to be removed from the system tray to
the point it actually powers down. In short, the card does work, but at
this point something is preventing it from "seeing" plugged in devices (or
initialize them?) while the card is in.
Does this give anyone any ideas?
From: James McKenzie [mailto:firstname.lastname@example.org]
Sent: Monday, October 13, 2003 10:38 AM
To: Colgrove, George
Subject: Re: [Thinkpad] TP 76x problem with USB pccard
Are these cards capable of running powered devices? Most of the cards
that I found would not power my Zip or external Hard Drives because they
draw too much power.
Go back to the manual for the cards and read through it throughly.
It is my humble opinion that the attached devices draw too much power
from the PC Card but will work with a hard wired USB port because they
can provide sufficent power.
Colgrove, George wrote:
> I now have tried 4 separate USB 2.0 High speed cards in 4 separate
> ThinkPad 76x laptops. One is a 765D, the next a 760 XD, and two 760
> ELs. The cards have been two Belkin's 2 port card and two generic 4
> port cards. All the computers are using Windows 98SE.
> The problem is this:
> 1. The drivers install fine. So far OK
> 2. When I insert the card, the computer recognizes the card and set
> up the drivers. So far OK
> 3. put in a powered device, the device lights up as if getting
> power. So far OK
> 4. But here is the problem; the devices that are plugged in do not
> get recognized. The computer acts as if it the device was not
> 5. I have taken two of the above computers and plugged them into my
> docking station which has two USB ports. Plugging in devices
> there does produce results. So I have to believe that the USB
> sub system is working. I think the problem is with the pc card
> Are there some settings I am not getting right?