Re: Can't use any display name other than :0.0
From: Dances With Crows (danSPANceswitTRAPhcrows_at_gmail.com)
Date: 03/18/05
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Date: 18 Mar 2005 14:45:31 GMT
On Fri, 18 Mar 2005 14:14:57 GMT, Paul Coene staggered into the Black
Sun and said:
> I'm relatively new to linux, but I'm an old hand (20+) years with Unix
> in general and I've used alot of X windows. Recently, I've started
>
> %xterm
> it brings up an xterm as one might expect.
>
> If I type:
> %xterm -display "localhost:0"
> xterm Xt error: Can't open display: localhost:0
Yep. X is trying to use TCP/IP to connect to localhost. This may not
work. If you do "ps auxw | grep X", you'll probably see a line like so:
root 9492 0.1 4.6 19652 17976 ? S Mar17 1:00
/usr/X11R6/bin/X -nolisten tcp -auth /var/run/xauth/A:0-ZMuEvo vt7
...note the "-nolisten tcp". That makes it so that X won't listen for
TCP of any type. This makes it impossible to use the "normal" xhost
+foo method, or to use X-over-TCP at all.
> The same occurs with any display other than ":0.0"...
> I have xhost + set, so that should not be the problem.
AAAAH! Don't do that. Use "xhost +machine" or better yet, use ssh -X.
> I have three systems. Two of the 3 behave this way.
Find the ?dm config file where X is started. Mine's in
/usr/kde/3.3/share/config/kdm/Xservers since I'm using kdm on KDE 3.3.
gdm is probably /etc/X11/gdm/gdm.conf . Find the line where X is
started, delete the "-nolisten tcp" part of it. For gdm, make sure
"DisallowTCP=true" is commented out. Restart X and things should work
better.
On a local network, it's OK to use xhost and X-over-TCP. Over the wide
Net, use ssh -X (or ssh -Y) so your X traffic is encrypted. If you take
out the "-nolisten tcp" on the machines on your LAN, you might want to
block TCP 6000 at your gateway, just in case. HTH,
-- Matt G|There is no Darkness in Eternity/But only Light too dim for us to see Brainbench MVP for Linux Admin / mail: TRAP + SPAN don't belong http://www.brainbench.com / Hire me! -----------------------------/ http://crow202.dyndns.org/~mhgraham/resume
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