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My Dell laptop (XPS 15z) has special keys on the F1-F12 keys. If i want to disable keyboard backlight for example, i must type fn + F6. Is it possible to invert it ?

In fact, i don't often use the F* keys. How can I only hit F6 to disable the backlight and fn+F6 to type F6 ?

Is it possible ?


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up vote 30 down vote accepted

It should be possible to do it in the BIOS. Quoting the XPS 15z manual:

  1. Press F2 during POST (Power On Self Test) to enter the System Setup (BIOS) utility.

  2. In the Function Key Behavior, select Multimedia Key First or Function Key First.

    • Function Key First — This is the default option. Press any function key to perform the associated function. For multimedia action, press Fn + the required multimedia key.
    • Multimedia Key First — Press any multimedia key to perform the associated multimedia action. For function, press Fn + the required function key.
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+1 Confirm this, I have this laptop too. – Caesium Dec 15 '11 at 19:57
This works for a different model Dell laptop I have as well, and I would suspect for anything else with Dell's BIOS (don't have experience with any other vendors). – zpletan Mar 13 '12 at 14:11
This also works for my Lenovo (Flex 2) Laptop. No 2 options as mentioned above, just an enable and disable option. – blo0p3r Sep 18 '14 at 3:36
On a new Dell XPS 13, the option is under "POST Behavior", "Fn Lock Options" – JavadocMD Jun 18 '15 at 20:59
If enabled in the BIOS (which I assume it is by default), you can toggle the behavior of the Fn key with the Fn+Esc hotkey. – airstrike Jan 31 at 22:11

I am not sure if it works for all models, but on mine if you press Fn+Esc it changes the Fn lock so that F1+F12 work as normal and when you hold Fn+(lets say F11) it will change the brightness or whatever that keys secondary function is. Pressing Fn+Esc again reverts it back to default. Hope this helps.

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Gah, thank you for posting this! I accidentally pressed this without even realizing such a feature exists. Would go hunting around BIOS if you hadn't helped! – kaqqao Nov 11 '15 at 0:31
This works! Awesome, thanks – ATOzTOA Feb 12 at 2:59
Perfect ! Exactly what I was looking for – Saif Asif Mar 31 at 7:05

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