xkb symbols para teclado de laptop ABNT2 ficar parecido com US INTERNATIONAL

mycustomlayout

// file:/usr/share/X11/xkb/symbols/mycustomlayout
default partial alphanumeric_keys
xkb_symbols "mycustomlayout" {

    // Based on a very simple Brazilian modified ABNT2 keyboard,
    // by Daniel Ribeiro (danieltribeiro@gmail.com).
    // With added support for dead keys in I18N applications,
    // by Conectiva  (http://www.conectiva.com.br).
    // the idea is to have almost the us-international with cedil

    include "br(abnt2)"
    name[Group1]="Portuguese (Brazil - dtr)";

        key <TLDE> { [   grave,     dead_tilde,       notsign,         notsign ] };
    key <AE06> { [       6,dead_circumflex,       notsign,       diaeresis ] };
    key <AD11> { [  bracketleft,      braceleft,   ordfeminine,     dead_macron ] };
    key <AD12> { [ bracketright,     braceright,     masculine,       masculine ] };

    key <AC11> { [    semicolon,          colon, dead_belowdot,   dead_abovedot ] };
    key <BKSL> { [   apostrophe,       quotedbl,    dead_acute,      dead_grave ] };

    key <AC10> { [     ccedilla,       Ccedilla,    dead_acute,dead_doubleacute ] };

    key <LSGT> { [    backslash,            bar,    dead_caron,      dead_breve ] };

    // The ABNT-2 keyboard has this special key:
    key <AB10> { [        slash,       question,        degree,    questiondown ] };

    key <PRSC> { [ Prior, Prior, Prior, Prior ] };
    key <PAUS> { [ Next, Next, Next, Next ] };

	key <UP> { [ Up, Up, Prior, Prior ] };
	key <LEFT> { [ Left, Left, Home, Home ] };
	key <DOWN> { [ Down, Down, Next, Next ] };
	key <RGHT> { [ Right, Right, End, End ] };

    include "kpdl(dot)"

    include "level3(ralt_switch)"
};

You need to add this to /usr/share/X11/xkb/rules/evdev.extras.xml inside layoutList tag

    <layout>
      <configItem popularity="exotic">
        <name>mycustomlayout</name>
        <shortDescription>mycustomlayout</shortDescription>
        <description>Portuguese (My Custom Layout)</description>
      </configItem>
    </layout>

Refresh ubuntu keyboard
$> gsettings set org.gnome.desktop.input-sources show-all-sources true