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Re: X11 Error: Couldn't find per display information
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Re: X11 Error: Couldn't find per display information


  • Subject: Re: X11 Error: Couldn't find per display information
  • From: Randy Ford <email@hidden>
  • Date: Mon, 3 Feb 2003 21:27:16 -0600

On Monday, February 3, 2003, at 02:30  PM, Joseph Hartvigsen wrote:

I am trying to run x11 on an iMac (500MHz PPC G3, 10.2.3) which is
current on the software updater. I can run local x11 clients fine, but
have
trouble running a client on another machine and having it display on
the iMac x11server. I've run xhost + or xhost remotehostname on the
iMac, then on the remote (HPUX) machine shell window done a
setenv DISPLAY imac-hostname:0.0 (in csh). However, when I try to
launch any client program on the HPUX shell which I've set DISPLAY
to the mac, it waits several minutes and quits out with the following:

Error: Can't open display:  imac-hostname:0.0
Error: Couldn't find per display information

It may be the firewall. Do you have it enabled? X uses at least port 6000. I don't know if you have to open up anything else. If you use xhost + and don't block port 6000, people from outside can do bad things.


Most people seem to tunnel X-windows through ssh now; it's a lot more secure, and convenient to boot. I had to change /etc/ssh_config and /etc/sshd_config to set X11Forwarding to yes. (Just doing ssh -X user@host didn't work for me: I had to add X11Forwarding in /etc/ssh_config even though sshd was already set to allow it.)
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  • Follow-Ups:
    • X11 Terminal at Startup
      • From: "Mark D. Wagner, M.Ed." <email@hidden>
References: 
 >X11 Error: Couldn't find per display information (From: Joseph Hartvigsen <email@hidden>)

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