screensaver extension / beforelight windowing behaviour

[Daniel Drake]

Hi,

I'm battling with the screensaver extension (Xss), and I've discovered
that the screensaver example appliation (beforelight) encounters the
same problem:

Under GNOME, when the screensaver activates, beforelight appears as a
window (with title bar, maximize/minimize button etc) and draws its
contents inside. The gnome-panel menu and task bars are still visible.

Under twm, when the screensaver activates, the mouse cursor changes to
the one where it wants you to position a new window. Of course, the
process of positioning this window generates input events which
deactivate the screensaver...

I'd expect beforelight to effectively "take over" the screen, rather
than appearing as a window managed by the WM.

What is beforelight doing wrong?
http://xorg.freedesktop.org/archive/individual/app/beforelight-1.0.2.tar.bz2

Thanks,
Daniel