Brightness Fn keys suspend the notebook

Question

In Ubuntu 14.10, everytime I press any of the "Brightness Fn keys" the notebook suspend, by the way the "Sleep Fn key" does nothing at all.

Is there a way to remap all the Fn keys manually?

Thanks!!

Answer 1

I don't know anything about keybinding but here is a quick fix open the terminal and type

xrandr -q | grep " connected" 

then to change the screen brightness enter

xrandr --output LVDS1 --brightness 0.0

0.0 can be anything from 0.0 to 2.0

Answer 2

Some laptops will swap the fn hotkeys around meaning pressing the fn key and any f1-f12 key is really the f keys and not the alternate keys so not pressing the fn key gives you the alternate keys like adjusting the volume and brightness. If a f key is assigned to put it to sleep by the os and you hit fn and that f key it will put to sleep and pressing the fn key and the sleep key will not put it to sleep because you are really activating just that f key not the alternate sleep key. I hope i didn't make that to complicated. If not that you have something i've never heard of.

Answer 3

This works for me :

1) Edit /etc/default/grub and change this variable:

GRUB_CMDLINE_LINUX="pcie_aspm=force acpi_osi=Linux acpi_backlight=legacy"

2) Edit /etc/modprobe.d/blacklist.conf and add this line at the end of the file:

blacklist toshiba_acpi

3) Update the grub config file:

sudo update-grub

4.) Reboot.

https://askubuntu.com/a/450357