I already tested tv settings: they are ok but problem persists.
I mean to the inner setting of the software Kodi: in the Android version i disable the hardware acceleration option-Mediacode (Surface) in player settings menu and so, when a video is playing and i enter in the optons of the stream (video settimgs) i can to set the brightness value.
But this procedure doesn't work with Kodi in Libreelec because there isn't that hardware acceleration (Mediacodec (Surface)) to deactivate but there are other 2 different options (hardware acceleration OMXPlayer and hardware acceleration MMAL) and deactivating these two, no brightness option appears.
