Public bug reported:

xfce-power-manager does not dim on inactivity on lenovo g700 laptop.
all other graphical settings are fine, whta can I do to fix this

some information

lspci -k | grep -iA2 VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor 
Graphics Controller (rev 09)
    Subsystem: Lenovo Device 3977
    Kernel driver in use: i915
 for interface in /sys/class/backlight/*; do echo -e "\n $interface"; cat 
$interface/{brightness,max_brightness,actual_brightness}; done

 /sys/class/backlight/acpi_video0
7
10
7

 /sys/class/backlight/intel_backlight
4882
4882
1301

and

Code:

BOOT_IMAGE=/boot/vmlinuz-3.2.0-59-generic
root=UUID=5445fbf6-d7d5-4378-8ac7-69264731dcfb ro quiet splash
acpi_osi=Linux vt.handoff=7

** Affects: xfce4-power-manager (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1286454

Title:
  xfce-power-manager does not dim

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