ldisc_send(NULL, 0, 0);
if (term->ldisc)		        ldisc_send(term->ldisc, NULL, 0, 0);
void term_pwron(Terminal *term){    power_on(term);    ldisc_send(NULL, 0, 0);	       /* cause ldisc to notice changes */    fix_cpos;    term->disptop = 0;    deselect(term);    term_update(term);}