[Bug 1583861] Re: Keyboard backlight isn't properly restored after idle on systems with hardwired configuration

[Chris J Arges]

Hello Marco, or anyone else affected,

Accepted upower into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/upower/0.99.4-2ubuntu0.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: upower (Ubuntu Xenial)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1583861

Title:
  Keyboard backlight isn't properly restored after idle on systems with
  hardwired configuration

Status in Dell Sputnik:
  New
Status in Upower:
  Unknown
Status in gnome-settings-daemon package in Ubuntu:
  Confirmed
Status in unity-settings-daemon package in Ubuntu:
  Triaged
Status in upower package in Ubuntu:
  Fix Released
Status in gnome-settings-daemon source package in Xenial:
  New
Status in unity-settings-daemon source package in Xenial:
  New
Status in upower source package in Xenial:
  Fix Committed

Bug description:
  In Dell or ThinkPad (for these you need a kernel which includes fix
  for lp:1574498) notebooks with keyboard backlight, the keybindings to
  control the keyboard backlight don't emit any event to the userland,
  about the state change, nor they request userland to change it (as it
  happens in other models which emits KEY_KBDILLUM{UP,DOWN,TOGGLE}
  events), this causes unity/gnome-settings daemon not to restore the
  proper backlight after idle.

  Steps to reproduce:
   0) ensure your keyboard backlight is on, and
       gdbus call --system --dest org.freedesktop.UPower \
        --object-path /org/freedesktop/UPower/KbdBacklight \
        --method org.freedesktop.UPower.KbdBacklight.GetBrightness
      returns a value != from 0. If not, just call the SetBrightness
      method with a positive value, to turn on the backlight.

      Now turn off the keyboard backlight (or set it to another level)
      using the laptop keys, and run:
       gsettings set org.gnome.desktop.session idle-delay 1
      to make things easier to test.

   2) Wait one second and the screensaver should start. Wait the screen to
      be turned off. If you just changed the brightness level at the step above,
      once the screen is turned off, also the keyboard backlight should be turned off too.

   3) Now press a key or move the mouse.

  Expected behavior:

   4) The keyboard backlight should be set back to the previous level (so it should stay off
      or go back to the level you set before the idle timeout happened).

  Actual behavior:

   5) The backlight is set to the level it had at point 0).

  
  To reset the idle-delay, just call
    gsettings reset org.gnome.desktop.session idle-delay

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