Im having a Qt widget based application which is having Slider , Progress bar . Im updating the values of each controls per every second basis like ui->my_Progress->setValue(timer_value); . The problem is the UI controls are blinking while updating the values in my ECU and it is working fine with the system. Also im using export QT_ONSCREEN_PAINT=force to run the application in my ECU.Any body having any idea on this.