[WBEL-users] Re: Display problem

[Henry Stilmack]

Simon Hodge asked:

> Hi,
> 
> I've search the web without success for some time and so hoped someone
> here could help!  I've just downloaded and installed WBEL - version 4.0.
> I did a full install.
> 
> I've logged in with a user, disabled access controls (xhost +) and then
> remotely logged into another machine.  On the remote machine I set the
> DISPLAY variable to the WBEL machine.  When I attempt to start a
> graphical application, such as nedit, I get the 'Can't open display'
> message.  For example:
> 
> local> xhost +
> local> rlogin remote
> 
> remote> DISPLAY=local:0
> remote> nedit
> Nedit: Can't open display
> 
> 
> I know this may not be a Whitebox problem, but I haven't had the problem
> on any other distro (yet!) so just wondered if any other Whitebox users
> experienced it or could offer some advice?
> 
> Thanks very much!
> Simon
> 

If you are using gdm as a display manager (maybe kdm and xdm too,
although I haven't checked) you need to modify a line in
/etc/X11/gdm/gdm.conf which by default causes X not to listen on TCP
ports. A diff follows:

*** factory-gdm.conf    Sat Mar 26 03:55:19 2005
--- gdm.conf    Fri Apr 22 09:45:43 2005
***************
*** 188,194 ****
  # Note: Anytime we find a -query or -indirect on the command line we do
  # not add a "-nolisten tcp", as then the query just wouldn't work, so
  # this setting only affects truly local sessions.
! #DisallowTCP=true
  # By default never place cookies if we "detect" NFS.  We detect NFS
  # by detecting "root-squashing".  It seems bad practice to place
  # cookies on things that go over the network by default and thus we
--- 188,194 ----
  # Note: Anytime we find a -query or -indirect on the command line we do
  # not add a "-nolisten tcp", as then the query just wouldn't work, so
  # this setting only affects truly local sessions.
! DisallowTCP=false
  # By default never place cookies if we "detect" NFS.  We detect NFS
  # by detecting "root-squashing".  It seems bad practice to place
  # cookies on things that go over the network by default and thus we

Then restart X.

-- 
Henry Stilmack, CISSP <h.stilmack at jach.Hawaii.Edu> Systems Administrator
UK/Canada/Netherlands Joint Astronomy Centre   Tel: +1 808-969-6530
660 N. A'ohoku Place, Hilo, HI 96720           Fax: +1 808-961-6516
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