Setting Waves and Realtek to On in the Startup menu solved the problem.
My laptop bought in May 2021 was recognizing the headphones when connected to the jack input. When connected, a new windows was showing up with a selection between line and headphone ... For two weeks no, this is not functioning anymore. The laptop does not recognized the headphones and the windows is not more showing up. 1- I have tested the headphone (on my phone ) they work 2- I have already change the realtek driver (multiple times) - the one part of "sound,audio and game controllers" and the one part of "audio inputs and outputs" - no success 3-Dell technician was on site last week - he changed the hardware - no sucess - then he has rechanged the driver and it has fixed the problem for a day - Now, it's again not working  Any help will be welcome
Inspiron 7506 2-in-1, headphone not seen when connected to the 3.5mm jack