How do change a particular option in linux kernel config file? I tried to follow the default config file for my Creator CI20 in particular setting the CONFIG_HID as follow: # CONFIG_HID is not set See ref here. However everytime, I do a: $ make menuconfig <Exit>+<Save> It turns back to: CONFIG_HID=y How do I make sure to have `CONFIG_HID=n` in my case ?

You certainly have checked another option which automatically enables CONFIG_HID.

While in menuconfig, you can use '/' to search for CONFIG_HID and find which other option enables it.