Hello, I am using simple program
#include <gtk/gtk.h> int main(int argc, char *argv[]) { GtkWidget *window; gtk_init(NULL, NULL); window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_widget_show(window); g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL); gtk_main(); return 0; } I compiled it using gcc simple.c `pkg-config --cflags gtk+-3.0 --libs` if I do ./a.out, GUI is showing up. but if I do "sudo ./a.out", I am seeing the following error : ================================================ $ sudo ./a.out No protocol specified Unable to init server: Could not connect: Connection refused (a.out:7961): Gtk-WARNING **: cannot open display: :0 ================================================ As my application back end needs root privileges, I need to open the GUI using sudo only. Can some one help in fixing this issue ? The same code was working fine in Ubuntu 17.04. But I am facing this issue after upgrading to Ubuntu 17.10. Thanks -- Lokesh Chakka, Mobile: 9731023458 _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list