kernel-packages team mailing list archive

[AceLan Kao <1203982@xxxxxxxxxxxxxxxxxx>]

In this case, we can ask BIOS to create an extra WMI method for us to adjust the brightness from software during the development period.
But it's too late to discuss with them.

Or we could ask BIOS to remove all _BCL, _BCM method in the BIOS, so
that the system won't create any acpi_video* directories under
/sys/class/backlight/ , so there won't be a brightness sliderbar in the
birghtness GUI.

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https://bugs.launchpad.net/bugs/1203982

Title:
  [Dell Inspiron One 2020] Unable to adjust screen brightness

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  CID: 201301-12632 Dell Inspiron One 2020

  On this all-in-one desktop, I was unable to adjust screen brightness in System Settings/Brightness and Lock
  The slidebar of brightness level could be freely adjusted , but nothing happens.

  The OSD works fine on this system, screen brightness could be adjusted through it
  But the change is not reflected in "Brightness and Lock"

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.5.0-23-generic 3.5.0-23.35~precise1
  ProcVersionSignature: Ubuntu 3.5.0-23.35~precise1-generic 3.5.7.2
  Uname: Linux 3.5.0-23-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1575 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7d00000 irq 42'
     Mixer name	: 'Realtek ALC662 rev3'
     Components	: 'HDA:10ec0662,10280579,00100300'
     Controls      : 17
     Simple ctrls  : 8
  Date: Tue Jul 23 02:47:00 2013
  HibernationDevice: RESUME=UUID=0c9d79aa-e95b-4c59-b8e4-c51b862b1982
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  MachineType: Dell Inc. Inspiron One 2020
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-23-generic root=UUID=36293b43-a3d7-4ff2-a6f7-608f8002990b ro quiet splash initcall_debug vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-23-generic N/A
   linux-backports-modules-3.5.0-23-generic  N/A
   linux-firmware                            1.79.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/30/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 03KE02
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X02
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd01/30/2013:svnDellInc.:pnInspironOne2020:pvr:rvnDellInc.:rn03KE02:rvrX02:cvnDellInc.:ct3:cvr:
  dmi.product.name: Inspiron One 2020
  dmi.sys.vendor: Dell Inc.

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