I have a "power button" on my keyboard that enables standby or hibernate. I can't find the mapping of this key anywhere in "sytem settings>Keyboard", "system>power management", "compiz config> or similar (where I could find it before unity). How can I disable (not remap) this button?
I do not want to disable hibernate/sleep altogether, it's simply this key that gets pressed a lot by accident and it's getting quite annoying.
Disable the suspend button in your system
gsettings set org.gnome.settings-daemon.plugins.power button-suspend "nothing"
Revert to the default value
gsettings set org.gnome.settings-daemon.plugins.power button-suspend "suspend"
Disable the sleep button in your system
gsettings set org.gnome.settings-daemon.plugins.power button-sleep "nothing"
Revert to the default value
gsettings set org.gnome.settings-daemon.plugins.power button-sleep "hibernate"
Disable the hibernate button in your system
gsettings set org.gnome.settings-daemon.plugins.power button-hibernate "nothing"
Revert to the default value
gsettings set org.gnome.settings-daemon.plugins.power button-hibernate "hibernate"
Settings those options above does not disable the functions in your system, you can still use the cog wheel menu to hibernate / suspend, this only disables keyboard and other buttons you might have in your computer.
Dconf Editor is the recommend replacment to gconf editor for Unity. You can get dconf in the software center or by typing sudo apt-get install dconf-tools in the terminal.
With Dconf editor, navigate to org gnome settings-daemon plugins power. There you can change what the sleep button does, as well as many other buttons on your keyboard.
Since Ubuntu 18.04, Bruno Pereira's answer doesn't seem to work anymore.
To disable any key, you will need to get its code:
xmodmap -pk | grep -i sleep
For me, the sleep button has the code 150 as you can see:
150 0x1008ff2f (XF86Sleep) 0x0000 (NoSymbol) 0x1008ff2f (XF86Sleep) 0x0000 (NoSymbol) 0x1008ff2f (XF86Sleep) 0x1008ff2f (XF86Sleep)
Once you have the key code, you mainly have two ways to automatically disable it.
If you just need to disable it for one or many users, you can add this command to the Startup Applications, assuming the key code of your sleep button is 150:
xmodmap -e 'keycode 150='
If the user logs off, the button will be enabled again. If you want to keep it disabled, try the other method instead.
The button will be disabled after each booting. You will need the administrator privileges for this. Edit this file:
sudo gedit /usr/share/X11/xkb/keycodes/evdev
The line we will have to edit looks like <SOMETHING> = <your_keycode>. Once you found it, add // at the beginning to comment it. In my case, I had to change this:
<I150> = 150; // #define KEY_SLEEP 142
Into this:
// <I150> = 150; // #define KEY_SLEEP 142
Note: With both methods, the button will still be enabled for few seconds when booting or logging in.
Sources:
Have you also tried this one?
gsettings set org.gnome.settings-daemon.plugins.power button-suspend "nothing"
I did all 3 from the linked-to question and it fixed this for me (x86 on 12.04).
EDIT: Here's a single command that does all 3:
for x in button-{suspend,sleep,hibernate}; do
gsettings set org.gnome.settings-daemon.plugins.power $x "nothing";
done
None of this worked for me, I don't have Gnome I use OpenBox, as most of you will know is very "bare bones" with a Ubuntu 18.04 kernel running.
This solution should work for most systems.
Go to this path: /etc/systemd
Edit as root: logind.config
ADD or uncomment these lines;
HandlePowerKey=ignore
HandleSuspendKey=ignore
HandleHibernateKey=ignore
Why did I do this, this cheap goofy keyboard has "Power", "Sleep", "Wake Up" following the F1-F12 keys, when I go to press F12 I hit power and the system powers off and my work is lost!
