Thinkpad brightness control not working code#

Suppose the above script is called brightness.sh then it can be used as. Now the following bash script can be used: #!/bin/bash Here is bash script solution based on xrandr: First create a file to store the current brightness value using echo 1.o > brightness.txt. Note: Your backlight device may be defined in a different location than /sys/class/backlight/acpi_video0 - that's just where mine happened to be. You can verify your brightnessup/down acpi event codes by using acpi_listen in your terminal and then pressing the relevant key combination (e.g., for me, it's Fn + Down Arrow for brightness down).ДЇinally, don't forget to restart acpid with sudo /etc/init.d/acpid reload etc/acpi/events/bl-down event=video/brightnessdown BRTDN 00000087 00000000

The following are the actions/events I defined in /etc/acpi/actions and /etc/acpi/events, respectively: ActionsД«l_device=/sys/class/backlight/acpi_video0/brightnessД®cho $(($(cat $bl_device)-1)) | sudo tee $bl_deviceД®cho $(($(cat $bl_device)+1)) | sudo tee $bl_device What I ended up doing is creating acpi actions and events which corresponded to the keys being pressed. I ran into an issue upon a fresh installation of i3wm on my laptop where, for whatever reason, my XF86MonBrightnessUp/Down keys weren't being registered (I checked with xev). This is an old question, but an answer may help out others.

Thinkpad brightness control not working code#

Copying from an old answer of mine to a question: XF86MonBrightnessUp/XF86MonBrightnessDown special keys not workingД®dit: As noted below, you must have acpi installed on your machine for these to work :)Д®dit 2: This code increments/decrements the brightness values by 1, but some models will have values that range in the thousands, so modify the change accordingly.