GRFIOCBLANK
case GRFIOCBLANK: /* blank ioctl, IOCON/OFF will turn ite on */
error = gp->g_mode(gp, GM_GRFIOCTL, data, GRFIOCBLANK, dev);
case GRFIOCBLANK:
case GRFIOCBLANK:
case GRFIOCBLANK:
case GRFIOCBLANK:
case GRFIOCBLANK:
case GRFIOCBLANK:
case GRFIOCBLANK: