SmartCard: USB Weirdnesses

Georg C. F. Greve greve at
Wed May 4 14:03:55 CEST 2005

 || On Wed, 04 May 2005 07:14:42 -0400
 || "J. Wren Hunt" <wren at> wrote: 

 jwh> Which version(s) of the kernel are you running? (Use 'uname -a'
 jwh> to output a brief listing if you're not sure)

Verified this on two machines:

One desktop machine running

One laptop running with additional ACPI, swsusp2, ipw2100.

FYI: I see plenty of resets on the USB bus when using the USB
SmartCard readers -- and the device usually seems to get shut down
when it rejects being assigned an address after/as part of a reset.

The shutdown happens AFTER a successful (in terms of result) operation
and NOT before an unsuccessful operation, as one might suspect.

If I can provide additional input, please let me know.


Georg C. F. Greve                                 <greve at>
Free Software Foundation Europe	                 (
Join the Fellowship and protect your freedom!     (
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