-----Original Message----- From: Stefan Baur <X2Go-ML-1@baur-itcs.de> To: x2go-user <x2go-user@lists.x2go.org> Sent: Mon, Jul 11, 2016 10:58 am Subject: Re: [X2Go-User] X applications fail after su - on x2go connection

Am 11.07.2016 um 15:15 schrieb webe3vt@aim.com:

When I am connected to a Debian server through x2go, my X applications work. When I su - user2 then try any X application they don't work. For example emacs will start in terminal mode and java applications give errors such as java.lang.InternalError: Can't connect to X11 window server using ':52' as the value of the DISPLAY variable

When I echo $DISPLAY before the su -, :52 is the correct display.

I have several other machines that do not have this problem. How do I fix it so that X works through x2go after su -.

There used to be a command "sux" that would allow this, but it's been removed from Debian - https://packages.debian.org/search?keywords=sux

Maybe you'll find some pointers here: https://en.wikipedia.org/wiki/X_Window_authorization#Cookie-based_access

Kind Regards, Stefan Baur

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Thank you. I used to use sux until Debian took it away. You triggered a memory of what I did to make X work after sux was taken away.

I add this to /etc/pam.d/su

session optional pam_xauth.so

I found the information in the following links when I was looking for an sux replacement.

https://askubuntu.com/questions/428284/what-is-a-good-alternative-to-the-sux...

https://wiki.archlinux.org/index.php/Running_X_apps_as_root

When I did it on the machine that was not working, it allowed X to start working after su.

Brent Elmer