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[Bug 1245288] Re: can not alter display brightness after upgrade to 13.10

 

SavageFX, thank you for reporting this bug to Ubuntu. Saucy reached EOL on July 17, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

Is this an issue in a supported release? If so, could you please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1245288

** Package changed: ubuntu => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1245288

Title:
  can not alter display brightness after upgrade to 13.10

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I'm on a Lenovo b570e. Since upgrade to kubuntu 13.10 the screen
  brightness can no longer be altered. Worked fine in kubuntu 13.04 and
  still works fine in windows 7 (dual boot).

  I tried
  - using the special keys (fn-key + arrow up/down). This was my default way to change brightness in 13.04. In 13.10 it doesn't even show the brightness 'progress bar' (see attachment if you don't know what bar I mean) with the new percentage (fn-key + arrow left/right to change volume still works fine by the way and DOES show the bar)
  - installed and tried xbacklight -set 50. This shows the brightness 'progress bar' but the screen brightness doesn't actually change.
  - use the battery widget which also has a slider for the screen brightness. Again, it shows the brightness 'progress bar' but the screen brightness doesn't actually change. 

  I read the instruction below about finding the package but I have no
  idea. Clearly it's not a GUI level issue since both the widget and
  xbacklight don't work so it's deeper but I don't know where.

  other people with the same problem:
  - http://askubuntu.com/questions/364868/brightness-at-100-since-updating-from-kubuntu-13-04-to-13-10
  - http://www.kubuntuforums.net/showthread.php?63855-Problems-upgrading-from-13-04-to-13-10

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