Am Tue, 11 Oct 2011 21:06:13 +0200
schrieb Alexander Neundorf <neundorf@kde.org>:

> You can also switch to a text-mode console (Ctrl+F1 etc), set
> DISPLAY, and start the window manager there.
Errr... "no".
In case there's an open VT and chvt is permitted, it's
completely pointless to lock the screen, since the chvt shortcuts
operate on X11 directly and are not affected by sucking the event loop,
ie. they even work when the screen is locked.

Cheers,
Thomas