kernel-packages team mailing list archive

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

Mark, as per http://support.lenovo.com/us/en/products/laptops-and-
netbooks/thinkpad-edge-laptops/thinkpad-edge-e330 an update to your
computer's buggy and outdated BIOS is available (1.12). If you update to
this following https://help.ubuntu.com/community/BIOSUpdate does it
change anything?

If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful. As well, you don't
have to create a new bug report.

Once the BIOS is updated, if the problem is still reproducible, and the
information above is provided, then please mark this report Status
Confirmed. Otherwise, please mark this as Invalid.

Thank you for your understanding.

-- 
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https://bugs.launchpad.net/bugs/1486896

Title:
  On Lenovo Thinkpad Edge E330, the screen backlight flickers badly.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Behavior is the same on Ubuntu 14.04 -- 15.04.

  Steps were taken according to this:
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight

  With acpi_backlight=vendor, the flicker stops, and the brightness control doesn't work.
  However,
      echo 8 > /sys/class/backlight/intel_backlight/brightness
  dims the screen.

  thinkpad-acpi.brightness_enable = 1 does nothing.

  Workaround: If no changes are made to boot options, and
      echo 4437 > /sys/class/backlight/intel_backlight/brightness
  is done, the flicker stops and the GUI control / acpi_video0 works, but causes flicker again.

  Attaching the necessary files.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-26-generic 3.19.0-26.28
  ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
  Uname: Linux 3.19.0-26-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mark       1391 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Aug 20 11:21:39 2015
  HibernationDevice: RESUME=UUID=7a9e1f17-c57b-4e6f-bb0c-0b090b5d1405
  InstallationDate: Installed on 2014-08-22 (363 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: LENOVO 3354DGG
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-26-generic root=UUID=b566feb2-5a5c-4573-8782-b78d130dbc45 ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-26-generic N/A
   linux-backports-modules-3.19.0-26-generic  N/A
   linux-firmware                             1.143.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-08-20 (0 days ago)
  dmi.bios.date: 02/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: H3ET72WW(1.09)
  dmi.board.asset.tag: Not Available
  dmi.board.name: 3354DGG
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98409 Std
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrH3ET72WW(1.09):bd02/25/2013:svnLENOVO:pn3354DGG:pvrThinkPadEdgeE330:rvnLENOVO:rn3354DGG:rvr0B98409Std:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 3354DGG
  dmi.product.version: ThinkPad Edge E330
  dmi.sys.vendor: LENOVO

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