[X2Go-User] x2godesktopsharing Connection error No protocol specified xwininfo: error: unable to open display ":0"

[Víctor J. Sánchez]

Hi again,
I've be able to resolve this issue. The problem was in the SSH server
config file. The only options referred to X2Go were "X11Forwarding yes"
and "X11DisplayOffset 10" but there were a couple of options missed:
"AllowTcpForwarding yes" and "X11UseLocalHost yes".
Now with last four options set I'm able to connect to assist to another
user in the remote machine.
Thanks for all.Regards.
----
El jue, 29-06-2017 a las 17:33 +0200, Víctor J. Sánchez escribió:
>     Hi all,
>     I'm trying to connect to an existing user session (local desktop
>     mode) to help him in a remote host using x2godesktopsharing
> feature
>     but I always get the next error (the first is in spanish):
> 
>     
> 
>     
> p, li { white-space: pre-wrap; }
> 
>     Error en la conexión No protocol specified xwininfo: error:
> unable to open display ":0" No protocol specified xwininfo: error:
> unable to open display ":0" 
> 
>     
> 
>     The scenario is:
>     
> 
>     - Remote host: Linux Mint 18.1 x64, Plasma 5 session,
> nopasswordlogin user and unprivileged (user A) logged in, X2Go
> Desktop Sharing running and enabled, administrator (sudoer) user B
> included in group x2godesktopsharing
>     
> 
>     x2goversion:
>     x2goagent: 3.5.0.32
> x2godesktopsharing: 3.1.1.3
> x2goserver: 4.0.1.20
> x2goserver-printing: 4.0.1.20
> x2goserver-xsession: 4.0.1.20
> 
> 
>     - Local host: Fedora 25 Workstation x64, Plasma 5 session
>     
> 
>     x2goversion:
>     cups-x2go: 3.0.1.3
> x2goagent: 3.5.0.32
> x2goserver: 4.0.1.20
> x2goserver-extensions: 4.0.1.20
> x2goserver-fmbindings: 4.0.1.20
> x2goserver-printing: 4.0.1.20
> x2goserver-xsession: 4.0.1.20
>     Client X2Go v. 4.1.0.0 (Qt - 4.8.7)
>     
> 
>     I also tested on a local host with Windows 10 X2Go client and the
> error is the same. However other connection types (terminal or
> published applications) work fine. I've also tried with another
> remote sessions: XFCE, Cinnamon, ... the same result.
>     
> 
>     Also I've observed that if the remote user A executes in a
> terminal window the "xhost +" command, when the user B connects to
> remote host with local desktop mode a window to choose a desktop is
> presented but only appears "non-existent" user B sessions (user B,
> screen :0) instead of user A session.
>     
> 
>     What's wrong here?
>     
> 
>     Thanks for your support.
>     Regards.
>     
> 
>   
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.x2go.org/pipermail/x2go-user/attachments/20170801/b719ac16/attachment.html>