kernel-packages team mailing list archive

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

JenniferHodgdon, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux REPLACE-WITH-BUG-NUMBER

Please note, given that the information from the prior release is
already available, doing this on a release prior to the development one
would not be helpful.

If reproducible, could you also please test the latest upstream kernel available (not the daily folder) 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. For example:
kernel-fixed-upstream-v3.13-rc7

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. As well, please remove the tag:
needs-upstream-testing

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

As well, please remove the tag:
needs-upstream-testing

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.

** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

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

-- 
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/1214148

Title:
  Intel video: Display backlight cannot be changed on Toshiba Portege
  Z935

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  On my Toshiba Portege Z935-ST4N03 laptop, the display hotkeys and
  display brightness settings do not work at all.

  Symptoms:
  1. When I use Fn F6 or Fn F7, I get a pop-up window that shows a light bulb and a slider, and the slider goes obediently up and down as I press F6/7. However, the brightness of the screen does not change as the slider indicator changes.
  2. If I go into the Power Manager and set the display brightness to dim after a few seconds has passed, it doesn't dim.

  So it seems to me that the hotkeys are being recognized as a method to
  change the display brightness, but that the operating system is unable
  to change the hardware's actual screen brightness... I don't think
  it's a hotkey problem per se.

  I read through https://wiki.ubuntu.com/Kernel/Debugging/Backlight and
  I think I have the problem defined as:

  Backlight control does not work, but there are entries in
  /sys/class/backlight.

  Although I do not seem to have the Brightness applet on my system (I
  am running XFCE, so maybe that is why), but the Power Manager's
  brightness control is definitely not working.

  This is a recent install of Ubuntu, on a newly purchased laptop, so I
  have no idea whether it was working in previous versions of Ubuntu,
  kernels, etc. Sorry.

  I used the "ubuntu-bug" utility to report this bug, so I am not sure
  what else you need... but I am starting by attaching the Xorg log, and
  will attach the lspci output and other information shortly. I am also
  going to follow the rest of the debugging steps on the Backlight
  debugging page and attach the output as separate comments on this
  report.

  $ lsb_release -rd
  Description:	Ubuntu 13.04
  Release:	13.04

  $apt-cache policy xorg
  xorg:
    Installed: 1:7.7+1ubuntu4
    Candidate: 1:7.7+1ubuntu4
    Version table:
   *** 1:7.7+1ubuntu4 0
          500 http://us.archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4
  Uname: Linux 3.8.0-27-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  Date: Mon Aug 19 14:01:34 2013
  InstallationDate: Installed on 2013-06-17 (62 days ago)
  InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1214148/+subscriptions