GUFW returns a segmentation fault in line 13

Question

When I run GUFW as root, it returns:

No protocol specified
Unable to init server: Could not connect: Connection refused
No protocol specified
Unable to init server: Could not connect: Connection refused

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_modifier_mask: assertion 'GDK_IS_KEYMAP (keymap)' failed

(gufw.py:5272): Gdk-CRITICAL **: gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed

(gufw.py:5272): Gtk-CRITICAL **: _gtk_replace_virtual_modifiers: assertion 'GDK_IS_KEYMAP (keymap)' failed
/usr/bin/gufw-pkexec: line 13:  5272 Segmentation fault      (core dumped) python3 ${LOCATIONS[${i}]} $1

It crashes due to a segmentation fault, even though this is a fresh install of a stable GUFW build.

How do I fix the problem?

Pradana Aumars · Accepted Answer · 2017-10-08 09:44:56Z

4

Type the following command in a terminal:

echo $XDG_SESSION_TYPE

If it returns Wayland, type:

xhost si:localuser:root

to allow root to start graphical apps under Wayland sessions.

answered Oct 8 '17 at 9:44

Pradana Aumars

2593 silver badges16 bronze badges

This fixed the issue for me, but it doesn't persist after a reboot. Hopefully this will be resolved with Debian 11 since it's just around the corner.
– Gerowen
Jun 6 at 0:10

Add a comment |

Ekaitz · Accepted Answer · 2018-09-18 19:17:13Z

0

Take a look here, I had the same problem running Manjaro KDE. Simply changing this, worked correctly:

/etc/sddm.conf
DefaultPath=/usr/local/sbin:/usr/local/bin:/usr/bin

The explanation, in the cited thread.

edited Sep 18 '18 at 19:17

user88036

answered Sep 18 '18 at 18:52

Ekaitz

1

Add a comment |

Maence · Accepted Answer · 2020-10-27 19:49:10Z

0

I had the same issue. Accidentally found the solution for gparted over SSH here.

sudo -E gufw

This should work - assuming /etc/ssh/sshd_config is properly configured.

answered Oct 27 '20 at 19:49

Maence

1

Add a comment |

smac89 · Accepted Answer · 2020-11-05 19:58:25Z

The problem is that the executable is run using pkexec, as you can see from the contents of /usr/sbin/gufw:

#!/bin/bash
if [ $(loginctl show-session $(loginctl|grep $(whoami)|sort -n|tail -n 1 |awk '{print $1}') -p Type) = "Type=wayland" ]; then
    xhost +si:localuser:root
fi
c_user=$(whoami)
pkexec gufw-pkexec $c_user

Reading the manual page for pkexec, says:

The environment that PROGRAM will run it, will be set to a minimal known and safe environment in order to avoid injecting code through LD_LIBRARY_PATH or similar mechanisms. In addition the PKEXEC_UID environment variable is set to the user id of the process invoking pkexec. As a result, pkexec will not by default allow you to run X11 applications as another user since the $DISPLAY and $XAUTHORITY environment variables are not set. These two variables will be retained if the org.freedesktop.policykit.exec.allow_gui annotation on an action is set to a nonempty value; this is discouraged, though, and should only be used for legacy programs.

So basically, if you are trying to run gufw on an X11 system, this command won't work. However, if you directly do:

sudo gufw-pkexec

It works. Smh

EDIT

Found a solution at a bug report on the arch package. Basically, the path set in the polkit policy file for gufw (/usr/share/polkit-1/actions/com.ubuntu.pkexec.gufw.policy) used the wrong path for the executable.

I changed:

<annotate key="org.freedesktop.policykit.exec.path">/usr/bin/gufw-pkexec</annotate>

to

<annotate key="org.freedesktop.policykit.exec.path">/usr/sbin/gufw-pkexec</annotate>

And now it works

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