I've been using

vlock -a

for years ... it works.

Il giorno ven 12 lug 2019 alle ore 03:18 Laurence Perkins <
lperkins@openeye.net> ha scritto:

>
> > So the solution is to just use "xscreensaver" by jwz. Which can be
> > configured to just blank the screen etc. as wanted by the op. See
> > also
> > the FAQ: https://www.jwz.org/xscreensaver/faq.html
> >
> > HTH,
> > -dnh
> >
>
> Except I use xscreensaver myself and it in no way prevents VT switch,
> which is what the OP was hoping to find a way to do if and only if the
> screen is locked.  Programs that grab input still don't get to block
> combos that are processed by the X server before they even get to the
> program's input queue any more than grabbing input will block the alt-
> sysrq kernel-level interrupt keys.
>
> Disabling VT switch by the X server and then setting up some other way
> to trigger a switch that will be blocked by whatever screen locking
> program the OP wishes to use is the best solution I can think of.  chvt
> would be the program to call.  Whether he wants it to be a keyboard
> shortcut handled by his DE or some other trigger method is a matter of
> taste.
>
> LMP
>