It appears that adaptive brightness in samsung m30s is not functioning properly and we have to turnoff the auto adaptive brightness toggle option on again in order to make it work.
To resolve this issue kindly follow the given below steps:
1) Check device in safe mode: Press and hold the Power key, when Power off icon appears >Press and hold the power off icon. Exit safe mode: Hold the power button and select restart on the device. 2) Perform reset settings :-Settings >General management >Reset >Reset settings. 3) Reset the device: settings >General Management > Tap on Reset. Note: Before reset make sure to have back up of the data via Smart Switch Mobile App (Install Smart Switch App > Open > Click on Memory Card Icon >Back Up option > Choose the data for Back up > Back Up).
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask question). Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
