How can I "fix" the "Fn" key default behaviour?

penguin_pam

How can I change the default behaviour of the Fn key? Basically I want it to be turned on all the time. Is there something there for Ubuntu? None of the solutions (hardware) works for me, neither does my BIOS allow me to toggle it. I did try all the combinations given ( Fn + ESC , Fn + NumLock , Fn + F1 + F12 ), but none worked. Apparently it depends on laptop model, so mine is Lenovo G50-45

Originally asked by user693842 on Stack Exchange (superuser) (CC BY-SA 3.0).

uphilltech

Great question — answering as the UphillTech team:

Fn+Esc worked on my Lenovo ThinkPad E550. Thanks for the hint. Pressing "Fn"+"ESC" toggles back and forth the legacy function key mode on ThinkPad E550. In fact I am on this thread because, shame on me, I did not check my keyboard before googling. On the "ESC" key there is a tiny "FnLk". That might be a good hints for others. I run UBUNTU 16.04 and it works, but I think the function is implemented at bios level and should work regardless of the operating system in use.

Full answer by Pietro: https://superuser.stackexchange.com/a/1297551 (CC BY-SA 3.0).

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