fprintd - Problem after resuming from LID closed

[Alex Botev]

Hi,
So I got this error as I described on the mailing of fprintd:
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So I have the problem that often after LID open it seems that fprintd does not seem to respond to the PAM module, thus I have about 30 sec of no way of logging in my session, which is a bit frustrating - I get the screen, but no option for finger verification or password. After ~30-40sec I get the password field finally, but note that fprintd has 10 sec timeout in the PAM module. After putting out debug on I got this:

Feb 21 10:04:44 botev-ThinkPad-T440 systemd-logind[556]: Lid closed.
Feb 21 10:04:44 botev-ThinkPad-T440 systemd-logind[556]: Suspending...
Feb 21 10:16:06 botev-ThinkPad-T440 unity[2100]: pam_fprintd(unity): timeout specified as: 10
Feb 21 10:16:06 botev-ThinkPad-T440 systemd-logind[556]: Operation finished.
Feb 21 10:16:06 botev-ThinkPad-T440 systemd-logind[556]: Lid opened.
Feb 21 10:16:32 botev-ThinkPad-T440 unity[2100]: pam_fprintd(unity): get_devices failed: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

Any idea how to fix this or what exactly is the issue?
***
As suggest by Vasily Khoruzhick, I'm posting this here after I recompiled libfprintd and fprintd with debug on for more logging. Also note that I now I use 0.6.0 rather than 0.5.1. The error is still there, but now I have more logs (hope they help someone):

Feb 22 00:51:43 botev-ThinkPad-T440 systemd-logind[588]: Lid closed.
Feb 22 00:51:43 botev-ThinkPad-T440 systemd-logind[588]: Suspending...
Feb 22 00:51:43 botev-ThinkPad-T440 systemd-logind[588]: Removed session c1.
Feb 22 00:51:43 botev-ThinkPad-T440 unity[2193]: pam_fprintd(unity): Using device /net/reactivated/Fprint/Device/0
Feb 22 10:43:31 botev-ThinkPad-T440 unity[2193]: pam_fprintd(unity): verify_finger_selected Swipe your finger across the fingerprint reader
Feb 22 10:43:32 botev-ThinkPad-T440 unity[2193]: pam_fprintd(unity): Verify result: verify-unknown-error
Feb 22 10:43:32 botev-ThinkPad-T440 systemd-logind[588]: Operation finished.
Feb 22 10:43:32 botev-ThinkPad-T440 systemd-logind[588]: Lid opened.
Feb 22 10:43:57 botev-ThinkPad-T440 unity[2193]: pam_fprintd(unity): ReleaseDevice failed: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Feb 22 10:44:22 botev-ThinkPad-T440 sudo[3507]: pam_fprintd(sudo): Using device /net/reactivated/Fprint/Device/0
Feb 22 10:44:23 botev-ThinkPad-T440 sudo[3507]: pam_fprintd(sudo): verify_finger_selected Swipe your finger across the fingerprint reader
Feb 22 10:45:00 botev-ThinkPad-T440 sudoedit[3507]: pam_unix(sudo:auth): conversation failed
Feb 22 10:45:00 botev-ThinkPad-T440 sudoedit[3507]: pam_unix(sudo:auth): unable to obtain a password
Feb 22 10:45:00 botev-ThinkPad-T440 sudoedit[3507]: pam_unix(sudo:auth): auth could not identify password for [alex]
Feb 22 10:53:48 botev-ThinkPad-T440 gnome-keyring-daemon[1855]: couldn't allocate secure memory to keep passwords and or keys from being written to the disk

Info:
Description: Ubuntu 14.04.2 LTS
Release: 14.04
fprintd and libfprintd - 0.6.0 - compiled from source - http://lists.freedesktop.org/archives/fprint/2015-February/000675.html

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.