Re: running some X11-Applications with sudo under GNOME/Wayland fails

[Jeroen Mathon]

On Monday, March 6, 2017 11:13:59 AM CET Joachim Backes wrote:
>  Hi,
>  
>  seeing coincidentally  that some X11 applications with sudo under
>  GNOME/Wayland will fail:
>  -------------------------------------------------------------
>  For example:
>  
>  1. sudo xterm
>  No protocol specified
>  Warning: This program is an suid-root program or is being run by the
>  root user.
>  The full text of the error or warning message cannot be safely formatted
>  in this environment. You may get a more descriptive message by running the
>  program as a non-root user or by removing the suid bit on the executable.
>  xterm: Xt error: Can't open display: %s
>  
>  2. sudo gnome-terminal
>  No protocol specified
>  Unable to init server: Could not connect: Connection refused
>  Failed to parse arguments: Cannot open display:
>  ----------------------------------------------------------------
>  Running the same under Gnome/Xorg executes properly.
>  
>  Anybody sees this too?
>  
>  Kind regards
>  
>  Joachim Backes 
Hey Joachim,

Could you supply us with some more information, like:
 - The output of `echo $DISPLAY`
 - Verbose output of you're display manager
 - The version of the software you are using(Gnome, xorg and gdm)

Can you also answer a few extra questions such as:
 - Are you running the program from a vtty or a terminal inside your desktop 
environment(If yes what terminal are you using?)
 - Can you supply us with a list of the applications that do not work and 
could you also try running them trough `gnome-do`?

I will await your answer.