kernel-packages team mailing list archive

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

Taylor Raack, unfortunately, "Me too!" comments are simply unhelpful here on Launchpad. If you would like to be helpful, and so your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a  terminal while booted into the default Ubuntu kernel (not a mainline one) via:
ubuntu-bug linux

For more on this, please read the official Ubuntu documentation:
Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
https://wiki.ubuntu.com/Kernel/Policies/DuplicateBugs
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

As well, please do not announce in this report you created a new bug
report.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

-- 
You received this bug notification because you are a member of Kernel
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 also
  did not resolve the issue.

  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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