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[Oliver <oliverzier@xxxxxxxxx>]

Public bug reported:

I have an hostet ubuntu 14.04 server without an logical console. So i
installed a vnc server with xfce4. All applications works fine - except
gufw.

When i try to oben gufw with the icon in app launcher - nothing
happened.  If i start gufw in an terminal, the following error appear
(shortened):


(gufw.py:837): Gtk-CRITICAL **: _gtk_css_rgba_value_get_rgba: assertion 'rgba->class == &GTK_CSS_VALUE_RGBA' failed

(gufw.py:837): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
/usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: invalid (NULL) pointer instance
  self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')
/usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
  self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')

(gufw.py:837): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
/usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: g_object_get: assertion 'G_IS_OBJECT (object)' failed
  self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')


(gufw.py:837): Gdk-CRITICAL **: gdk_screen_get_display: assertion 'GDK_IS_SCREEN (screen)' failed
/usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: g_object_ref: assertion 'G_IS_OBJECT (object)' failed
  self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')

(gufw.py:837): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion
'GDK_IS_SCREEN (screen)' failed

(gufw.py:837): Gtk-CRITICAL **: gtk_style_provider_get_style_property:
assertion 'GTK_IS_STYLE_PROVIDER (provider)' failed

(gufw.py:837): Gtk-CRITICAL **: _gtk_style_cascade_get_for_screen:
assertion 'GDK_IS_SCREEN (screen)' failed

(gufw.py:837): Gtk-CRITICAL **: _gtk_style_provider_private_lookup:
assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed

** Affects: gui-ufw
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1365522

Title:
  gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed

Status in Gufw:
  New

Bug description:
  I have an hostet ubuntu 14.04 server without an logical console. So i
  installed a vnc server with xfce4. All applications works fine -
  except gufw.

  When i try to oben gufw with the icon in app launcher - nothing
  happened.  If i start gufw in an terminal, the following error appear
  (shortened):

  
  (gufw.py:837): Gtk-CRITICAL **: _gtk_css_rgba_value_get_rgba: assertion 'rgba->class == &GTK_CSS_VALUE_RGBA' failed

  (gufw.py:837): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
  /usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: invalid (NULL) pointer instance
    self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')
  /usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
    self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')

  (gufw.py:837): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
  /usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: g_object_get: assertion 'G_IS_OBJECT (object)' failed
    self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')

  
  (gufw.py:837): Gdk-CRITICAL **: gdk_screen_get_display: assertion 'GDK_IS_SCREEN (screen)' failed
  /usr/lib/python2.7/site-packages/gufw/view/gufw.py:74: Warning: g_object_ref: assertion 'G_IS_OBJECT (object)' failed
    self.builder.add_from_file('/usr/share/gufw/ui/gufw.ui')

  (gufw.py:837): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion
  'GDK_IS_SCREEN (screen)' failed

  (gufw.py:837): Gtk-CRITICAL **: gtk_style_provider_get_style_property:
  assertion 'GTK_IS_STYLE_PROVIDER (provider)' failed

  (gufw.py:837): Gtk-CRITICAL **: _gtk_style_cascade_get_for_screen:
  assertion 'GDK_IS_SCREEN (screen)' failed

  (gufw.py:837): Gtk-CRITICAL **: _gtk_style_provider_private_lookup:
  assertion 'GTK_IS_STYLE_PROVIDER_PRIVATE (provider)' failed

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