make sure to repaint the screen when screen turns on

    // this is a temporary work-around, eventually this should be called

    // by the power-manager

    SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);

    mDirtyRegion.set(hw.bounds());

    // from this point on, SF will process updates again

    repaintEverything();

}

void SurfaceFlinger::onScreenReleased() {

    const DisplayHardware& hw(graphicPlane(0).displayHardware());

    if (hw.isScreenAcquired()) {

        mEventThread->onScreenReleased();

        mDirtyRegion.set(hw.bounds());

        hw.releaseScreen();

        // from this point on, SF will stop drawing

    }