How to hotkey the brightness settings

Question

I want to hotkey certain often used brightness settings under ctrl+ F7 through F10. I can already change it with the therminal. To be able to do this I ran the following command

chmod 666 /sys/class/backlight/intel_backlight/brightness

After that I was able to change it with

echo <value I want> > /sys/class/backlight/intel_backlight/brightness

(You might need to change "intel_backlight" to whatever vendor you have.)

After that worked I went to "System Settings -> Keyboard -> Custom Shortcuts" and added a custom shortcut with the following values

Name = lowest brightness

Command = echo 1 > /sys/class/backlight/intel_backlight/brightness

and I set it run with ctrl + F7 but when I press ctrl + F7 nothing happens (

cat /sys/class/backlight/intel_backlight/brightness 

outputs the same value it had before pressing ctrl + F7)

Making a little script that executes these commands and setting that to a hotkey also didn't work (executing it with a therminal did work)

How do I fix this?

ps. my grub file has one a little alteration to make the brightness function keys work.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor dell_laptop.backlight=0"

but I can't use the function keys to reach the desired values

Answer 1

Never mind, I'm an idiot I forgot the shortcuts don't support bash script I changed my command value to

bash -c "echo <value I want> > /sys/class/backlight/intel_backlight/brightness"

That worked.

ooh well. this might still be useful to for some other people.