FC4 update breaks xlock (makes it hang)

[P. Thompson]

On Tue, 6 Sep 2005, Globe Trotter wrote:

> Dear list,
> 
> It appears that an update over the weekend has broken xlock -- obtained from
> the xlockmore RPM on FC4 extras. Can anyone please help?
> 
> xlockmore itself was not updated since the FC4 Extras date there appears to be
> June 30, 2005.

I don't have xlockmore, but I tried xscreensaver-command -lock which seems 
to hang unless DisallowTCP=false is set 
in /etc/X11/gdm/gdm.conf