I wrote a simple Lazarus program that displays a window and a button and did the same thing using Glade which also uses Gtk+.
I am using a Beaglebone Black with the latest stock Debian Jessie image which start a LxQt desktop program after it boots up. When I run my program in the LxQt window or in a terminal window, it runs fine. Now I want my Lazarus or Glade/Gtk program to run when I boot and not see the LxQt desktop program. I have tried using the Crontab with @reboot command method and the create a .service and use systemctl to register and start it. No matter what I try I get " Gtk-WARNING **: cannot open display: ". This also happen on a Beaglebone Green and happens when I use Wheezy or Jessie. What am I doing wrong and how can I fix it? Thanks, Newbie Ed
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