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

** Changed in: linux (Ubuntu Disco)
       Status: In Progress => Fix Committed

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  EeePC 1005px laptop backlight is off after system boot up

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Disco:
  Fix Committed
Status in linux source package in Eoan:
  Fix Released

Bug description:
  == SRU Justification ==
  Commit 78f3ac76d9e5 ("platform/x86: asus-wmi: Tell the EC the OS will
  handle the display off hotkey") causes the backlight to be permanently off
  on various EeePC laptop models using the eeepc-wmi driver (Asus EeePC
  1015BX, Asus EeePC 1025C).

  == Fix ==
  * 1dd93f87 (platform/x86: asus-wmi: Only Tell EC the OS will handle
  display hotkeys from asus_nb_wmi)

  This patch addes a .wmi_backlight_set_devstate quirk for specific
  models to make asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL)

  Only X/D contain the commit that introduce this issue (78f3ac76), this
  patch can be cherry-picked into D.

  For X, it needs some content adjustment to add quirks only to those
  models that exist in Xenial tree.

  == Test ==
  Test kernels could be found here:

  Bug reporter has verified that this fix works as expected on X.

  == Regression Potential ==
  Low, quirks limited to specific ASUS laptops and by far there is no
  further change to this in upstream kernel.

  == Original Bug Report ==
  After kernel update the backlight on my Asus eeepc 1005px becomes off during 
boot up. I can see the login screen if I point light to the screen. The 
backlight is not reacting on brightness adjustment keys. The backlight starts 
working only if I close and open the laptop lid.

  I have tried to:
  * echo 10 > /sys/class/backlight/acpi_video0/brightness
  * echo 125 > /sys/class/backlight/intel_backlight/brightness
  * vbetool dpms on
  * pass "acpi_backlight=vendor" kernel parameter
  * install gdm instead of lightdm
  * create /usr/share/X11/xorg.conf.d/80-backlight.conf with content 
recommended in Kernel/Debugging/Backlight Wiki article
  with no luck.

  The backlight works fine if I pass "acpi_osi=" kernel parameter, the
  brightness is adjusted by keys, but the applet does not react to

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-145-generic 4.4.0-145.171
  ProcVersionSignature: Ubuntu 4.4.0-145.171-generic 4.4.176
  Uname: Linux 4.4.0-145-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Thu Jul 18 22:30:44 2019
  InstallationDate: Installed on 2019-02-17 (151 days ago)
  InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
  SourcePackage: linux-signed
  UpgradeStatus: No upgrade log present (probably fresh install)

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