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I understand that I should be able to use X11 to show graphs from a remote R when I use a local emacs to connect to the remote machine with tramp.

I have tried a few different things but can not get it to work. I know that the server will work with X11 as if I ssh in using a normal terminal it works.

Currently my .emacs file has:

;; emacs x11 tramp
(add-to-list 'tramp-remote-process-environment
              (format "DISPLAY=%s" (getenv "DISPLAY")))


(with-eval-after-load 'tramp
  (add-to-list 'tramp-methods
               '("sshx11"
                 (tramp-login-program        "ssh")
                 (tramp-login-args           (("-l" "%u") ("-p" "%p") ("%c")
                                              ("-e" "none") ("-Y") ("%h"))) ; tried -Y and -X :(
                 (tramp-async-args           (("-q")))
                 (tramp-remote-shell         "/bin/sh")
                 (tramp-remote-shell-login   ("-l"))
                 (tramp-remote-shell-args    ("-c"))
                 (tramp-gw-args              (("-o" "GlobalKnownHostsFile=/dev/null")
                                              ("-o" "UserKnownHostsFile=/dev/null")
                                              ("-o" "StrictHostKeyChecking=no")
                                              ("-o" "ForwardX11=yes")))
                 (tramp-default-port         22)))
  (tramp-set-completion-function "sshx11" tramp-completion-function-alist-ssh))

On my local machine I also have two files, config and sshd_config in my .ssh folder. The latter simply contains X11Forwarding yes whereas the former has Host my_alias Hostname myhost User myusername ForwardX11 yes ForwardX11Trusted yes (with appropriate subs)

I connect to my server with C-x C-f sshx11:user@host:/ I then do M-x shell and select the "remote shell path" (to bin bash) and the starting directory.

Now when in the shell if I try echo $DISPLAY I get /private/tmp/com.apple.launchd.zmPeFoMlxA/org.macosforge.xquartz:0

But if I try to load an xprogram such as xterm to test I get: xterm Xt error: Can't open display: /private/tmp/com.apple.launchd.zmPeFoMlxA/org.macosforge.xquartz:0

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  • 1
    Your X11 forwarding is not getting setup correctly. $DISPLAY should be something like "localhost:3.0", not what appears to be the value of $DISPLAY on your local machine. This works for me here, but I don't mess with tramp-remote-process-environment.
    – rpluim
    Commented Oct 16, 2019 at 15:29

1 Answer 1

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I managed to kind of fix this by running "echo $DISPLAY" in a normal terminal and copying the value of that into the emacs terminal with "export DISPLAY=localhost:12.0" the value does change some times.

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