Hello,

> I've recently stumbled onto a problem, possibly with kde3.
>
> After some time (and I think this happens after resuming from RAM),
> new terminals (even text ones) have empty hostname, I can't run any X
> apps (cannot connect to X server :0.0), kde tells me "KDEInit could
> not launch 'anything'", and in .xsession-errors appears:
> ...

I've seen a problem like this when I've installed networkmanager, and connected to a network that tried to set my hostname (a 3g connection). When it set the hostname I had no other way of getting back control of X / KDE3 than restarting the X server. I've solved it by adding two lines into /etc/NetworkManager/nm-system-settings.conf:

[keyfile]
hostname=myhostname

if you don't use networkmanager, there must be some option to pass to your DHCP client so it doesn't overwrite your hostname... I don't think this is kde3 related (cannot connect to X server :0.0), but I might be wrong, never tried it on other DE's.

Regards,

Carlos Laué