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[Martin Konopka <1312318@xxxxxxxxxxxxxxxxxx>]

I do have the latest version of BIOS installed. My computer is a dual-
boot one so that it installs BIOS updates  when it runs Windows 7. The
problem with the brightness level persists. I am using ubuntu-MATE (see
below for more details on the OS).

Output of the  sudo dmidecode ...  command is:

L70 Ver. 01.33
07/21/2015

Please note that in HP they have a little ambiguity in dates of the BIOS
update: on their web page they show 29th July. To be sure that I really
have the latest BIOS installed, I tried to download the package from the
HP site and launched the binary (in Windows, just to see its
description). It showed its date as 21st July.

The bug description is the same as the original one: Anytime I boot up
the system, it always sets the display brightness to 100% which is too
much. I can control the brightness level using Fn F9 and Fn F10
combinations of keys. Unfortunately, my setting is not remembered. On
the contrary, in Windows 7 the brightness level that I choose remains
remembered.

BTW, today I made a clean installation of the newest 64-bit ubuntu
version: 15.10, with the MATE desktop. (I installed the newest daily
build from the 3rd October.) The brightness issue is the same as it was
in ubuntu-mate 15.04 and also in LinuxMint 17 which I was using for some
period in the past.

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/1312318

Title:
  brightness level not remembered on HP ZBook 15

Status in xserver-xorg-video-intel package in Ubuntu:
  New

Bug description:
  Anytime I boot up the system, it always sets the display brightness to
  100%.

  I can reduce the brighness using the   Fn F9  key stroke. Similarly I
  can increase the brighntess using  the  Fn F10 combination. (This did
  not work until recently - see my bug report 1257766). However, even
  now the chosen value is not remembered. After each start of the system
  I have to set a convenient brightness level.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Thu Apr 24 18:53:45 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:1909]
   NVIDIA Corporation GK107GLM [Quadro K1100M] [10de:0ff6] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:1909]
  InstallationDate: Installed on 2014-01-31 (83 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130)
  MachineType: Hewlett-Packard HP ZBook 15
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=56c3d081-90f2-445f-ade1-574586237cd6 ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L70 Ver. 01.06
  dmi.board.name: 1909
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 94.47
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrL70Ver.01.06:bd10/25/2013:svnHewlett-Packard:pnHPZBook15:pvrA3009DD10303:rvnHewlett-Packard:rn1909:rvrKBCVersion94.47:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ZBook 15
  dmi.product.version: A3009DD10303
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Thu Apr 24 18:40:23 2014
  xserver.configfile: default
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
   NOUVEAU(G0): [XvMC] Failed to initialize extension.
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                4589 
   vendor                                     AUO
  xserver.version: 2:1.15.1-0ubuntu2

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