for (unsigned int i = 0; i < m_mirOutput->num_modes; ++i) {
        MirDisplayMode mode = m_mirOutput->modes[i];
        qWarning() << "adding mode" << QString("%1x%2x%3").arg(
                QString::number(mode.vertical_resolution),
                QString::number(mode.horizontal_resolution),
                QString::number(mode.refresh_rate));
        if (i == m_mirOutput->current_mode) {
            qWarning() << "(was current mode)";
        }
    }