endless loop with fingerprint authorization

[George Shuklin]

When fingerprint device is used (by fingerprintd), xscreensaver asking for finger endlessly. This can be overrulled by combination of 'esc' and finger scanning.

That problem appears after upgrade from raring to sausy.

/etc/pam.d/xscreensaver:
@include common-auth
@include common-account

/etc/pam.d/common-auth:

# here are the per-package modules (the "Primary" block)
auth [success=2 default=ignore] pam_fprintd.so max_tries=1 timeout=10 # debug
auth [success=1 default=ignore] pam_unix.so nullok_secure try_first_pass
# here's the fallback if no module succeeds
auth requisite pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
auth required pam_permit.so
# and here are more per-package modules (the "Additional" block)
auth optional pam_ecryptfs.so unwrap
auth optional pam_cap.so

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xscreensaver 5.15-3ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
Uname: Linux 3.11.0-7-generic i686
ApportVersion: 2.12.1-0ubuntu3
Architecture: i386
Date: Thu Sep 12 10:06:26 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-07-19 (54 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release i386 (20130423.1)
MarkForUpload: True
SourcePackage: xscreensaver
UpgradeStatus: Upgraded to saucy on 2013-09-08 (4 days ago)