I’ve been trying for some time now to enable my computer’s Fn+F9/F10 brightness control. Reading this thread, I tried to set up an acpi event/action script to manually change my brightness. The scripts themselves work – I can manually call bl_down.sh
and bl_up.sh
in the terminal.
However, for some reason the acpi events themselves aren’t triggering the scripts. I’ve included the output of acpi_listen
below, as well as the scripts:
~$ acpi_listen video/brightnessdown BRTDN 00000087 00000000 # FN+F9 video/brightnessup BRTUP 00000086 00000000 # FN+F10
bl_down.sh
#!/bin/sh bl_device=/sys/class/backlight/intel_backlight/brightness echo $(($(cat $bl_device)-100)) | sudo tee $bl_device
bl_up.sh
#!/bin/sh bl_device=/sys/class/backlight/intel_backlight/brightness echo $(($(cat $bl_device)+100)) | sudo tee $bl_device
So I know that acpi is enabled, and that the scripts work. It’s just that the event itself for some reason isn’t triggering the action. Any pointers in the right direction are appreciated!
EDIT: I forgot to include the actual acpi events:
bl_down
event=video/brightnessdown BRTDN 00000087 00000000 action=/etc/acpi/actions/bl_down.sh
bl_up
event=video/brightnessup BRTUP 00000086 00000000 action=/etc/acpi/actions/bl_up.sh
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Answer
Welp, figured it out. Reading other posts on this site, I realized that I needed to restart acpid. After trying sudo /etc/init.d/acpid reload
, everything is working as it should.