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I'm having an issue running Kubuntu 13.04 with brightness, something that seems common. In particular, brightness can be found in these 2 directories:

/sys/class/backlight/acpi_video0/brightness
/sys/class/backlight/intel_backlight/brightness

Now, the Fn+Up/Down buttons do in fact edit the brightness as specified in acpi_video0: however, this brightness is not what is rendered, instead the intel_backlight brightness is rendered and that one I have to edit it manually.

How can I set it so that the brightness specified in acpi_video0 is the one that my laptop renders, so that I can use the button shortcuts to change brightness as desired?

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1 Answer 1

Then you can use Xbacklight command , It going to use the ACPI modules to control the system brightness with some commands.

How to change LCD brightness from command line (or via script)?

If you dont want to do that way , Then Edit the shortcut key which was assigned to /sys/class/backlight/intel_backlight/brightness to /sys/class/backlight/acpi_video0/brightness

so everytime you call the hotkey instead of intel , acpi will have the call.

I mean simple change the way.

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