kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Asif Youssuff, could you please test the latest upstream kernel available from the very top line at the top of the page (the release names are irrelevant for testing in your release) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested exactly shown as:
kernel-fixed-upstream-3.18-rc3

This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug description.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags removed: bios-outdated-44cn43ww
** Tags added: latest-bios-44cn43ww

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1388636

Title:
  [Lenovo V570 Notebook] Brightness not changing via UI widget in GNOME
  shell or hotkeys

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Fresh install of a Vivid Vervet Ubuntu GNOME daily iso.

  Adding debugging information from
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight

  I found that

  echo 8 > /sys/class/backlight/intel_backlight/brightness

  worked to lower my screen brightness, without playing with kernel
  parameters.

  Booting with the kernel parameter: acpi_backlight=vendor did not
  enable the UI widget or hotkeys, although echo 8 >
  /sys/class/backlight/intel_backlight/brightness continued to work.

  Booting with the kernel parameter: video.use_bios_initial_backlight=0
  did not allow for hotkey or widget changes of brightness.

  Booting with the kernel parameter: video.use_native_backlight=1

  Creating /usr/share/X11/xorg.conf.d/80-backlight.conf

  with the contents:

  Section "Device"
      Identifier  "Intel Graphics"
      Driver      "intel"
      Option      "AccelMethod"     "sna"
      Option      "Backlight"       "intel_backlight" # use your backlight that works here
      BusID       "PCI:0:2:0"
  EndSection

  and rebooting does resolve the issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.16.0-24-generic 3.16.0-24.32 [modified: boot/vmlinuz-3.16.0-24-generic]
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  ApportVersion: 2.14.7-0ubuntu9
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  asif       2318 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sun Nov  2 15:48:05 2014
  HibernationDevice: RESUME=UUID=53025272-1910-418a-9f4a-b6ac00a768f1
  InstallationDate: Installed on 2014-11-01 (1 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20141031)
  MachineType: LENOVO 1066A9U
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-24-generic root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-24-generic N/A
   linux-backports-modules-3.16.0-24-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/11/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 44CN36WW
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Emerald Lake
  dmi.board.vendor: LENOVO
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnLENOVO:bvr44CN36WW:bd07/11/2011:svnLENOVO:pn1066A9U:pvrLenovoV570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
  dmi.product.name: 1066A9U
  dmi.product.version: Lenovo V570
  dmi.sys.vendor: LENOVO

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