** Description changed:

  I have screen brightness set to about 30% in gnome-control-center's
  Screen app.
  
  After I first login, the first time I press a brightness adjustment key,
  brightness is reset to 100%.
  
  Subsequent adjustments work correctly. It appears that the adjustment
  script is not reading the correct setting the first time, but stores it
  for subsequent adjustment events.
  
+ Another behaviour probably related to this: if I say turn the brightness
+ down to minimum and then switch to a guest session via the indicator-
+ session menu, when I switch back the brightness is set to full. If I
+ press either brightness adjustment key, it immediately resets the
+ brightness back to minimum. So upower is using its locally stored
+ setting, but it does not match the current setting.
+ 
+ 
  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: acpi-support 0.138
  Uname: Linux 3.1.0-rc4-git-20110831.1150 x86_64
  Architecture: amd64
  Date: Sun Sep  4 08:40:38 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
  SourcePackage: acpi-support
  UpgradeStatus: Upgraded to oneiric on 2011-09-02 (1 days ago)

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https://bugs.launchpad.net/bugs/840707

Title:
  screen brightness adjustment keys incorrectly reset brightness to 100%
  after login

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