I am a user, on my HP laptop, this worked fine,
to change the action key setting from the BIOS Setup Utility.
1. While booting the computer press the f10 key in quick successions to open the BIOS Setup Utility.
2. Press the right or left arrow key to select the System Configuration menu.
3. Press the up or down arrow key to select Action Keys Mode.
4.Press the enter key to display the Enabled / Disabled options.
5.Press the up or down arrow key to select one of the options.
o Enabled: Does not require pressing fn to use the actions printed on the function keys.
o Disabled: Requires pressing fn to use the actions printed on the function keys.
6. Press the f10 key to save the selection and restart the computer.
With this I am able to use the F1-F12 keys (F1-help, F2-edit mode, F12-save as etc,) independently without Fn. Other functionalities such as volume control, brightness control, keyboard light control, etc., work with fn.