We believe that your issue has been closed by the upload of
Version 0.27.0 of grml-live from Michael Prokop <mika@grml.org>.
The explanation is attached below

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Thu, 09 Jul 2015 12:10:56 +0200
Source: grml-live
Binary: grml-live grml-live-db
Architecture: source all
Version: 0.27.0
Distribution: unstable
Urgency: medium
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description:
 grml-live  - build system for creating a Grml (based) Linux live system
 grml-live-db - log package build information of grml-live to database
Changes:
 grml-live (0.27.0) unstable; urgency=medium
 .
   * Software related changes:
     - [eacb0a9] add stress to GRML_FULL. Thanks to Bernd Zeimetz
       <bzed@debian.org> for the suggestion
     - [467562f] add apt-transport-https to GRMLBASE
     - [0d4a8c8] replace vlock with physlock [Closes: issue1342]
   * [c057283] Drop unmaintained GRML_MEDIUM + GRML_XL classes
   * [597476b] grml-cheatcodes.txt: replace vlock with physlock
   * [32f2612] Drop unused-override from lintian file
Checksums-Sha1:
 2df8f83e01ea143bf5fe8df3c71ffd522cf8bf07 1632 grml-live_0.27.0.dsc
 7177ef19023c4e6dcf36d14ccf7e47ec3565109d 464012 grml-live_0.27.0.tar.xz
 7cf2d3554a9d6fb4f08b0249a52a170c12163ec7 69318 grml-live-db_0.27.0_all.deb
 0a22581a6b4d56277b7b5f105ec1282260c92310 490668 grml-live_0.27.0_all.deb
Checksums-Sha256:
 2248e77a35e631aa6b50ef45abaf10291076cf586cb777d2ad40a527fc34a3af 1632 grml-live_0.27.0.dsc
 7ebe07e9a119a159a445ecfadac4ec77789edf72569519da03dbf464538f88bb 464012 grml-live_0.27.0.tar.xz
 2bda8e18c05e621035dd029577b6e00ddc52dc5073255e22aeea6b4307016b56 69318 grml-live-db_0.27.0_all.deb
 232d1672bc818d6504dc337bfc79674b6b283851e5df4b4c02c045027017002e 490668 grml-live_0.27.0_all.deb
Files:
 f22b8e1251bae6761b6181c07153272c 1632 grml extra grml-live_0.27.0.dsc
 ecb872efee5b5e6f1023e3d0f9bea1f1 464012 grml extra grml-live_0.27.0.tar.xz
 7223be3b5dc781fc9604182996adbc85 69318 grml extra grml-live-db_0.27.0_all.deb
 e090fbe50529bd773c9f934e5a15748f 490668 grml extra grml-live_0.27.0_all.deb

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=Sbfw
-----END PGP SIGNATURE-----

We believe that your issue has been closed by the upload of
Version 2.6.0 of grml-scripts from Michael Prokop <mika@grml.org>.
The explanation is attached below

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Wed, 08 Jul 2015 15:19:07 +0200
Source: grml-scripts
Binary: grml-scripts
Architecture: source amd64
Version: 2.6.0
Distribution: unstable
Urgency: medium
Maintainer: Michael Prokop <mika@grml.org>
Changed-By: Michael Prokop <mika@grml.org>
Description:
 grml-scripts - Collection of little tools
Changes:
 grml-scripts (2.6.0) unstable; urgency=medium
 .
   * [efc6685] grml-lock: switch from vlock to physlock [Closes: issue1342]
   * [2193c71] Bump Standards-Version to 3.9.6
   * [3578556] Run wrap-and-sort on debian directory
Checksums-Sha1:
 0cb7d51172d7783fee4940a40651f9ceba245716 1608 grml-scripts_2.6.0.dsc
 dcb85b76d3a0c9235547c468cb24aaeeba36c799 73540 grml-scripts_2.6.0.tar.xz
 58953ad61fb6215fe96410bdeea1b16e41a7af1d 97598 grml-scripts_2.6.0_amd64.deb
Checksums-Sha256:
 78d9f731ac08c4135c53ead9773f01cdc269d07790b2e2eabc91811a6788b544 1608 grml-scripts_2.6.0.dsc
 b50a848b8fbc845c6d3d2af9c21d12b5eb8183f854b00454a6c9085249109f1b 73540 grml-scripts_2.6.0.tar.xz
 c5994b2f7ee4ece4fc9b6a9d0c373d67e2f6c9425980f046ea864b5ee089de6b 97598 grml-scripts_2.6.0_amd64.deb
Files:
 4a71677e52b875cdf6f8fd2679f0f6d0 1608 utils optional grml-scripts_2.6.0.dsc
 d881d772cd85f6814d5cbe6c10ba250d 73540 utils optional grml-scripts_2.6.0.tar.xz
 77efa8a0cbe1a10d772372691f0b7c4c 97598 utils optional grml-scripts_2.6.0_amd64.deb

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=vmza
-----END PGP SIGNATURE-----

In grml 2014.11 full version both i386 and amd64, grml-lock fails giving the error
vlock: loading plugin "new" failed: No such file or directory

This is apparently because currently vlock's --new option is disabled in Debian
upstream due to a bug that was "too hard to fix":
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=702705
See this thread for details:
http://comments.gmane.org/gmane.linux.distributions.grml.devel/154

Not sure if grml wants to work on this, but it appears that Debian currently has
no plans of re-enabling the --new option.  Thus presumably unless something
changes, grml-lock will remain unable to lock X sessions indefinitely.  At least
that's what I think I gather.