linux-kernel - Re: USB card reader trouble

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Message-ID: <4C5979CC.2050907@kingswood-consulting.co.uk>
Date:	Wed, 04 Aug 2010 15:31:40 +0100
From:	Frank Kingswood <frank@...gswood-consulting.co.uk>
To:	Andre Majorel <aym-xunil@...ser.fr>
CC:	linux-kernel@...r.kernel.org
Subject: Re: USB card reader trouble

On 04/08/10 14:40, Andre Majorel wrote:
> I'm having trouble reading Compact flash and SD cards on the
> same card reader. I'm not absolutely certain but it *seems* that
> once a medium of either type has been inserted, it will ignore
> the other type.
>
> Wherever the state is kept, it's not in the module. modprobe -r
> usb-storage; modprobe usb-storage gives a kernel message about
> "compact flash" even though the only medium in the reader is an
> SD card.

Are you sure that this card reader supports both types of cards 
simultaneously? Some/many/most card readers share signals between the 
connectors to save pins on the IC package.

Frank
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