Thats help, but adding this line in /etc/rc.local before exit 0 statement 
making brigthness hotkey unusable.
I need to change from setting. 

will adding this 
Section "Device"
Identifier  "Intel Graphics"
Driver      "intel"
Option      "AccelMethod"  "sna"
Option     "Backlight"          "intel_backlight"
Identifier  "Card0"
Driver      "intel"
BusID       "PCI:0:2:0"
EndSection

in xorg.conf help me?
Should i remove boot option acpi_backlight=vendor

Thanks for your help.

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https://bugs.launchpad.net/bugs/1007765

Title:
  brightness adjusting crashes system

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