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Lucastegano X avatar Ubuntu

Cannot execute ANY graphical program from terminal

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Lucastegano X

First of all this only happens if try to launch applications from the terminal. If i execute startx nautilus from a TTY it's able to nautilus is able to init.

The $DISPLAY env var it's ok, it is set on 0. That seems to not be the problem.

Also i disabled lightdm with sudo systemctl disable lightdm.service, i don't know if that's part of the problem.

I also ran: (Me)$:nautilus --gdk-debug=all --gtk-debug=all --g-fatal-warnings

And got as output:

Gtk-Message: 11:26:56.999: Loading module list: gail:atk-bridge
Gdk-Message: 11:26:57.004: Trying wayland backend
Gdk-Message: 11:26:57.004: opening display 
Gdk-Message: 11:26:57.004: Trying x11 backend
Gdk-Message: 11:26:57.006: Trying broadway backend
Unable to init server: No se pudo conectar: Conexión rehusada
Gdk-Message: 11:26:57.008: Trying wayland backend
Gdk-Message: 11:26:57.008: opening display 
Gdk-Message: 11:26:57.008: Trying x11 backend
Gdk-Message: 11:26:57.008: Trying broadway backend
Unable to init server: Could not connect: Connection refused  
Gtk-Message: 11:26:57.008: Failed to open display (null)
Gdk-Message: 11:26:57.008: Trying wayland backend
Gdk-Message: 11:26:57.009: opening display 
Gdk-Message: 11:26:57.009: Trying x11 backend
Gdk-Message: 11:26:57.009: Trying broadway backend
Unable to init server: Could not connect: Connection refused
Gtk-Message: 11:26:57.009: Failed to separate connection to default display

(nautilus:21043): Gdk-CRITICAL **: 11:26:57.009: gdk_display_get_default_screen: assertion 'GDK_IS_DISPLAY (display)' failed

When i try to launch ANY application happens the same. Examples: microsoft-edge: Unable to open X display.

gedit: (same as nautilus)

gnome-terminal: (also same as nautilus)

wine app: Application tried to create a window, but no driver could be loaded. / Make sure that your X server is running and that $DISPLAY is set correctly.

xterm: Xt error: Can't open display: :1

Pseint: Unable to initialize GTK+, is DISPLAY set properly?

And the list just never ends.

Do you have any idea of why is happening this?

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ubfan1
Did you enable the connection to your X server (xhost + will do it for everyone, so refine it after you get things working). I think :1 is your DISPLAY, so try that instead of 0.
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Lucastegano X avatar
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Lucastegano X
@ubfan1 first xhost .+ outputs: xhost: unable to open display "0" And second of all my DISPLAY var is ok, i changed it from 0 to 1 and 1 to 0 and nothing, also it always have been 0 and i didn't have this problem. Also i apologize for the delay of my replay.
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ubfan1
Looks like 0 might not be your DISPLAY, although that is the 18.04 default. Please post the output of ps auxww |fgrep X Interested in the one with your username and the first arg, mine is ... Xwayland :0 and my $DISPLAY is :-0 20.04 seemed to move to a default of :1 (without Wayland in my case).
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