Re: USB SD Card Reader

Do other devices work on the port?

If it is one of the front USB ports, check that the plug is fully
inserted on the motherboard header.


On 17/09/2009 11:42, Mark Spencer wrote:
> Hi there, any help gratefuly received.
>
> My USB SD Card reader doesnt work when plugged into one of my USB ports,
> but works when plugged into the adjacent port.
>
> I've tried uninstalling the driver from Device Manager.
>
> THanks
> Mark

The port may have a problem, or there may be some driver confusion. If
you are using a laptop the port may be too low in power priority to be
receiving enough power to work properly. (Laptops usually provide only
one 500mA supply shared between all ports instead of the 500mA to each
port which is the official standard. This conserves the laptop battery.)

WPD stands for Windows Portable Device. It's the driver that allows you
to treat your CF and SD cards and USB sticks as a devices for Media
Syncing. It is also required for ReadyBoost to work. The driver for the
card reader is not correctly installed and hence you get this error.

Clean up your devices in Device Manager as follows:

1. Go to My Computer -> Properties -> Advanced System Settings. Go into
Environment variables and create a new System variable called
devmgr_show_nonpresent_devices. Set this to a value of 1.

2. Go into Device Manager. From the view menu, choose "Show hidden
devices". Because of the environment variable, you now see all devices
not in use.

3. Uninstall any "Universal Serial Bus controllers" not in use (greyed
out). You can also uninstall any storage volumes, storage volume shadow
copies, and disk drives which are not in use. You should see your SD
card reader in one of these areas.

Then plug your SD reader in again and see what happens.



On 18/09/2009 10:49, Mark Spencer wrote:
> Hi Dominic, thanks. Yes the port works fine for other devices. Vista
> sees that a device is plugged into the port (Device Manager) but:
> 1. instead of appearing as "SD/MMC Reader", it appears as "!Microsoft
> WPD FileSystem Volume Driver"
> 2. No drive letter appears under "Computer"
>
>
> "Dominic Payer" <> wrote in message
> news:%23A$...
>> Do other devices work on the port?
>>
>> If it is one of the front USB ports, check that the plug is fully
>> inserted on the motherboard header.
>>
>>
>> On 17/09/2009 11:42, Mark Spencer wrote:
>>> Hi there, any help gratefuly received.
>>>
>>> My USB SD Card reader doesnt work when plugged into one of my USB ports,
>>> but works when plugged into the adjacent port.
>>>
>>> I've tried uninstalling the driver from Device Manager.
>>>
>>> THanks
>>> Mark
>