[Bug 1340544] Re: gnome-rr: Adjust the minimum brightness level when the maximum >= 100.

[Shih-Yuan Lee]

** Bug watch added: GNOME Bug Tracker #734267
   https://bugzilla.gnome.org/show_bug.cgi?id=734267

** Also affects: gnome-settings-daemon via
   https://bugzilla.gnome.org/show_bug.cgi?id=734267
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1340544

Title:
  gnome-rr: Adjust the minimum brightness level when the maximum >= 100.

Status in GNOME Desktop Common Files:
  New
Status in Gnome Settings Daemon:
  Unknown
Status in Unity Settings Daemon:
  New
Status in “gnome-desktop3” package in Ubuntu:
  New

Bug description:
  If the maximum brightness is equal to or bigger than 100, it has higher
  possibility that zero is off. So adjusting the minimum brightness to avoid the problem.

  Quotes from
  http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt

  "This property controls the brightness on laptop panels and equivalent
   displays with a backlight controller. The driver specific maximum
   value MUST turn the backlight to full brightness, 1 SHOULD turn the
   backlight to minimum brightness, 0 SHOULD turn the backlight off."

  Quotes from http://msdn.microsoft.com/en-
  us/library/windows/hardware/ff569755(v=vs.85).aspx

  "Brightness levels are represented as single-byte values in the range
   from zero to 100 where zero is off and 100 is the maximum brightness
   that a laptop computer supports. Every laptop computer must report a
   maximum brightness level of 100; however, a laptop computer is not
   required to support a level of zero. The only requirement for values
   from zero to 100 is that larger values must represent higher brightness
   levels."

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