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My Fn key is permanently activated/pressed, although it is deactivated in the BIOS. In Ubuntu pressing the FN+ESC keys doesn't do anything. Numlock is deactivated in the BIOS, so it can't interfere with the Fn key.

I only want the FN functions upon pressing the FN key, hence any idea how to achieve this?

My machine is a Dell 9560 - latest UK version.

Ubuntu 16.04, latest standard updates, Kernel 4.8.0.51-generic.

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I have managed to solve the problem. In Dell's boot options under 'POST Behaviour' --> 'Fn Lock Option' keep the check mark for 'Fn Lock' and below select 'Lock Mode Enable/Secondary'.

It seems wrong to select this because 'Lock Mode Enable/Secondary' is defined as:

The F1-F12 keys control the secondary functions. Fn is required to access the standard functions.

However, exactly the opposite is the case when selecting this option. F1-F12 work as function keys and only when Fn is pressed the secondary functions, e.g. volume down/up, brightness down/up, are triggered.

I found this solution on http://vetruvet.blogspot.de.

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