ASUS Eee PC 1025c

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Screen Brightness Keys

acpi

Setting brightness in /sys/class/backlight/acpi_video0/ with the scripts for acpid did change the values of the files brightness and actual_brightness but did not have any effect on current screen brightness.

Set the following as kernel parameters in your bootloader (see here)

acpi_osi=Linux acpi_backlight=vendor

To make this permant...

Now there is a folder eeepc-wmi in /sys/class/backlight and the scripts need to be updated

/etc/acpi/actions/bl_up.sh
  #!/bin/sh
  bl_device=/sys/class/backlight/eeepc-wmi/brightness
  echo $(($(cat $bl_device)+1)) >$bl_device
/etc/acpi/actions/bl_down.sh
  #!/bin/sh
  bl_device=/sys/class/backlight/eeepc-wmi/brightness
  echo $(($(cat $bl_device)-1)) >$bl_device