[Ubuntu Wiki] Update of "Kernel/Debugging/Backlight" by penalvch

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The "Kernel/Debugging/Backlight" page has been changed by penalvch:
http://wiki.ubuntu.com/Kernel/Debugging/Backlight?action=diff&rev1=23&rev2=24

Comment:
Due to LP#1159771 and others, clarified this article is for debugging backlight not working by default, not after a suspend/hibernate.

  <<Include(Kernel/MenuBar)>>
  ||<tablestyle="float:right; font-size: 0.9em; width:40%; background:#F1F1ED; margin: 0 0 1em 1em;" style="padding:0.5em;"><<TableOfContents>>||
+ 
+ If you have an issue where backlight stops working after suspend or hibernation, please see their respective debugging article. Otherwise, please continue with the below mentioned information.
  
  There are a lot of different issues with backlight control which can be generally put into these classes: