Stumped: Gtk-WARNING **: cannot open display:

[Collins Richey]

For grins, I just put up a kubuntu 5.04 on my older PC Since I was
willing to let ubuntu take over the harddrive, this was the simplest,
most painless install I have ever done. In practically no time I had a
running system including printer!!  and working nvidia card!! After
tinkering a bit with the apt-get sources, I put up IceWM and am
running that almost well.

I had some unplesant lockups with kynaptic, so I put up synaptic. Now
I'm stuck, and google seems to provide no answers. Synaptic must run
as root, so I did

1. xhost +localhost
2. export DISPLAY=localhost:0,0
3. sudo su -
4. synaptic &

I get the error Gtk-WARNING **: cannot open display:, and I'm unable
to find an answer. There are lots of reported problems, but no
answers.

Your help would be appreciated.

--
Collins Richey
      Debugging is twice as hard as writing the code ... If you write
      the code as cleverly as possible, you are, by definition, not
      smart enough to debug it.
             -Brian Kernighan