I am not using a skin. It could be because I modified Data.zip to add a custom loading screen and a custom logo. Primo of course is running in full screen but when I minimize it to change the brightness for example (the navigation has an external brightness control) when maximizing it it captures the screen and normaly when tapping the upper left corner. Disabling the screen capture in the extra setting does not do anything as well as puting the line in sys.txt lunapark provided. I will try some other package. Thanks for your help.