[Thinkfinger-devel] tf-tool no longer works due to usb_bulk_read error

[Val]

Hello.

I have thinkfinger 0.3 running on a T60 laptop under Ubuntu Feisty Fawn
(kernel 2.6.20)

===========================
***@thinkpad:/home/val# lsusb | grep SGS
Bus 004 Device 003: ID 0483:2016 SGS Thomson Microelectronics
Fingerprint Reader
===========================

thinkfinger used to work on this setup for a while after I first
installed Ubuntu and I was able to acquire the fingerprints for all the
users I needed. Today I tried to add another user's fingerprint and
found that tf-tool no longer works. I do not know what has changed.

===========================
***@thinkpad:/home/val# tf-tool --acquire --verbose

ThinkFinger 0.3 (http://thinkfinger.sourceforge.net/)
Copyright (C) 2006, 2007 Timo Hoenig <***@suse.de>

Running in verbose mode.

* Mode: acquire
* Biometric identification record file: '/tmp/test.bir'

Initializing... done.
tf-tool: TF_STATE_SWIPE_0 (0x02)
Please swipe your finger (successful swipes 0/3, failed
swipes:0)...tf-tool: TF_STATE_SWIPE_SUCCESS (0x05)
Please swipe your finger (successful swipes 1/3, failed
swipes:0)...tf-tool: TF_STATE_SWIPE_1 (0x03)
tf-tool: TF_STATE_SWIPE_SUCCESS (0x05)
Please swipe your finger (successful swipes 2/3, failed
swipes:0)...tf-tool: TF_STATE_SWIPE_2 (0x04)
tf-tool: TF_STATE_SWIPE_SUCCESS (0x05)
Please swipe your finger (successful swipes 3/3, failed
swipes:0)...tf-tool: TF_STATE_ENROLL_SUCCESS (0x07)
Please swipe your finger (successful swipes 3/3, failed swipes:
0)...done.
Storing data (/tmp/test.bir)...Warning: usb_bulk_read expected to read
0x40 (read 0x8 bytes).
===========================

After the above message tf-tool freezes (although it can still be
interrupted with Ctrl-C) and /tmp/test.bir is empty. The number of read
bytes reported in brackets is different between different runs of
tf-tool (i.e not always 0x8).

What can I try to troubleshoot this issue? Any ideas would be greatly
appreciated.

Thanks.