1/31/2024 0 Comments Xquartz ssh raspberry pi![]() A few postings about this parameter are in the context of the Cygwin X server, but the symptoms reported are the same as what I saw. Even the Mac OS X’s ssh_config or ssh man page do not even list ForwardX11Timeout as a parameter. Web searches for “ForwardX11Timeout” don’t help much there is very little information about it. So there is apparently a timeout for forwarding X11 display over SSH. Follow the same steps and at the time it fails to start a new xterm it will report: Rejected X11 connection after ForwardX11Timeout expired It’s an X11 Forwarding Timeout ![]() It fails with the message “xterm Xt error: Can’t open display: localhost:10.0”Īfter spending a few hours on this, the debug step that led me to the solution was to invoke ssh from the Mac with the highest level of debug logging: “ssh -vvv -X ”. Try to open another xterm from the same ssh login shell.Now wait a while… I had thought a couple of hours, but it may be less than that.The application puts a window on the Mac’s screen, and it all works fine. From the ssh login shell, start a new X11 application, such as “xterm”.Due to X11 forwarding, the Mac starts up its X11 server in response. This works fine and you get a new shell session on the remote system. Log in from the Mac to the Ubuntu server using “ssh -X ”.Other client systems, such as Ubuntu 11.10, don’t have this problem. The network is hardwired gigabit ethernet. I upgraded from 10.6 (Snow Leopard) a month ago, which may have been one source of the problem, but I can’t be certain there is a perfect correlation to that. My local system is a Mac running the latest Mac OS X (Lion, 10.7.2). Maybe this post will help someone else with a similar problem. In keeping with the purpose of this blog, I’m writing this up because it took a bit of effort to solve, and I found virtually no useful information about it on web searches. That’s what happened to me recently and through some debugging I found the solution, which I’ll get to in a minute. Once you installed Xming, you can see the service running in the Windows tray.X11 Display Forwarding Fails After Some TimeĪre you finding that an ssh session works fine to log in to a remote system and forward the display back to your local machine, but after a while stops being able to start new X11 applications? Specifically, the X11 display forwarding fails after some time, resulting in no usable display for the X11 application. One is Xming and another is PuTTY PuTTY is MIT license and Xming consists of open source libraries and exceptions. However, between X-Window and MS-Windows, we need two components to get it working. ![]() Between the same X-Window systems, it is only matter of setting an environment variable, "display" eg "DISPLAY=192.168.0.xxx:0". It allows us to remotely control other computer via network. Microsoft Windows has a nice application called "Remote Desktop" or "Remote Desktop Connection". X's network protocol is based on X command primitives. ![]() X features network transparency: the machine where an application program (the client application) runs can differ from the user's local machine (the display server). Used over network connections rather than on an integral or attachedĭisplay device. Unlike most earlier display protocols, X was specifically designed to be Good thing about X-Window is that it is designed to be running via network from the beginning. ![]()
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