Re: 6 in 1 memory card readers

[Rick Stevens <rstevens vitalstream com>]

Dennis Calhoun wrote:
> On Fri, 28 Nov 2003 09:50:18 +1000, you wrote:
>
>
> > I am trying to get a 6 in 1 memory card reader working on my Redhat 9
> > machine, running a custom 2.4.20-8 kernel.
> >
> > When I plug it in, I get a message on the console:
> >
> >
> > > hub.c: connect-debounce failed, port 1 disabled
> >
> > I use other usb flash memory devices (usb memory sticks) etc and have no
> > problem with them. Any idea what could be wrong here?
>
>
> Hmmm.... interesting. Do ya think that the "reader" might need a
> driver? A USB drive is one thing, but a reader like you speak of....
> seems likely to me that it would be something more and might well need
> the right stuff to run it.

No, they generally don't require a driver.  Once you insert the media,
the media is treated like a SCSI drive.

If plugging in the reader causes that message, there are several
possibilities:

1) The reader is sucking too much juice from your system.  Try using a
powered hub instead of plugging it directly into the USB ports (and some
of the cheap readers will do that).

2) The reader has a bad cable or connector (or the connector on your
system is flakey).  Try another port on your computer.

3) The reader is just flat broken.

You can try shutting down your system, plugging in the reader (do NOT
have any media in it...just the reader) and rebooting.  If the system
comes up happily and "dmesg" doesn't report any problems with the USB
system, try sticking in some media and accessing it.  A quick test is:

	fdisk -l /dev/sda

This should display the partition table of the media in the reader.
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- Rick Stevens, Senior Systems Engineer     rstevens vitalstream com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-             To iterate is human, to recurse, divine.               -
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