Doing 3 things fixed this for me.

1. Change the permissions on $HOME/.thinkfinger_bir  so that it is owned
by the user, not by root:

$ sudo chown pauljohn .thinkfinger.bir

2. Changing the permissions of the uinput device, which was root:root,
and instead this is needed:

chown root\:plugdev /dev/input/uinput

3. Add the udev rule mentioned in previous message.

Those steps *did* fix the problem on my T61 Lenovo Thinkpad.  Now the
finger swipe will unlock me.

I'm using the 0.3+r118 thinkfinger packages from Jon Oberheide's
repository:

$ dpkg -l | grep thinkf
ii  libpam-thinkfinger                        0.3+r118-0ubuntu4~ppa1            
    PAM module for the STMicroelectronics finger
ii  libthinkfinger0                           0.3+r118-0ubuntu4~ppa1            
    library for the STMicroelectronics fingerpri
ii  thinkfinger-tools                         0.3+r118-0ubuntu4~ppa1            
    utilities for the STMicroelectronics fingerp

PJ

-- 
(gutsy) lock screen doesn't support fingerprint readers driven by thinkfinger
https://bugs.launchpad.net/bugs/138957
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