Brightness control issue on laptop

I am using HP Pavilion Gaming 15, specs core i5 9300H, with Nvidia GTX 1650, at first when i installed ubuntu brightness control buttons were not working but brightness control bar was there, with volume bar,so it could be done now after update the brightness controller disappeared completely and can not set brightness, i tried different methods but none have worked so far. Enen istalled brightness controller and bunch of other methods but none worked.