2015-01-02 13:41 GMT+01:00 Evgeni Golov <evgeni@grml.org>:
Hi,

On Fri, Jan 02, 2015 at 11:20:35AM +0000, sajolida wrote:

> I've been investigating the screen locking mechanism of those various
> Debian based live distributions, and I found out that none of them had
> a real mechanism to do so. They either:
>
>   - Do not provide any screen locking mechanism (Knoppix, Grml,
>     Jondo Live).

Grml has grml-lock[1], you should have set a proper password before
using it, obviously ;)

FYI, note that Debian disabled the --new switch in vlock which limit now the desktop locking capability.

Here is what you can read in the NEWS file:
     vlock (2.2.2-4) unstable; urgency=medium
       This update disables the new.so plugin and thus the --new switch, because it
       proved too hard to fix it properly. See #702705.

See also:
    Debian Bug report logs - #702705
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=702705