Try this: In a Terminal, enter
Code:
find /sys/ | grep brightness
If you see
Code:
/sys/devices/virtual/backlight/acpi_video0/brightness
Then edit the lines 85-86 in file /usr/bin/eee-control-daemon
From
Code:
elif os.path.exists("/sys/class/backlight/eeepc/brightness"):
        brn_path = "/sys/class/backlight/eeepc/brightness"
To
Code:
elif os.path.exists("/sys/class/backlight/acpi_video0/brightness"):
        brn_path = "/sys/class/backlight/acpi_video0/brightness"
Hope that helps!