Where the "g_debug" output in GDM source code?

Question

I want to know how gdm works, so I read the gdm source code. I saw a lot of g_debug output in the source code like this:

case SIGUSR1:
            g_debug ("Got USR1 signal");
            /* FIXME:
             * Play with log levels or something
             */
            ret = TRUE;

            gdm_log_toggle_debug ();

            break;

But I want to know where I can find the g_debug output.

Answer 1

You have to set the G_DEBUG environment variable to make GLib print out the debugging information.

Check the values in the documentation for Running and Debugging GLib Applications.

Answer 2

In Fedora 20, you can modify the gdm configuration file, /etc/gdm/custom.conf then add the following.

[debug]
Enable=True
Gesture=True

Then you can view the logs by typing journalctl -lr in the terminal.