kernel-packages team mailing list archive

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

Alkis Georgopoulos, as per http://us.acer.com/ac/en/US/content/drivers
an update is available for your BIOS (1.30). If you update to this
following https://help.ubuntu.com/community/BiosUpdate , does it change
anything?

If not, 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

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.

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

Thank you for your understanding.

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

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https://bugs.launchpad.net/bugs/853244

Title:
  Acer Aspire 5742Z brightness keys not working

Status in The Linux Kernel:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  In 2.6.32 (Lucid) there's an
  /sys/devices/virtual/backlight/acpi_video0 interface for Aspire 5742Z,
  and brightness hotkeys do modify the values of the files in that dir,
  but the actual laptop brightness isn't changed.

  In 3.0.0-9 (Oneiric beta 1) there's no /sys/devices/virtual/backlight
  interface at all.

  If I boot with acpi=off, the brightness keys correctly modify
  brightness, but of course I lose all other ACPI functionality.

  I tried some of the other acpi-related kernel parameters (acpi_backlight=vendor etc) mentioned in
   * https://wiki.ubuntu.com/Kernel/Debugging/Backlight
   * https://wiki.ubuntu.com/DebuggingACPI
   * www.kernel.org/doc/Documentation/kernel-parameters.txt
   * http://www.lesswatts.org/projects/acpi/debug.php
  to no avail, brightness only works with acpi=off or acpi=ht.

  I tried the fwts tool for ACPI testing, and it produced some errors, I'm attaching the output.
  I also tried playing with acpiexec, but calling the _BCM method didn't change the brightness either.

  `ubuntu-bug linux` doesn't work from the oneiric beta live CD, I'll
  manually attach lspci etc as well.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-24-generic 3.2.0-24.37
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
  Uname: Linux 3.2.0-24-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER PID ACCESS COMMAND
   /dev/snd/controlC0: alkisg 1705 F.... xfce4-volumed
                        alkisg 1736 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xb4400000 irq 44'
     Mixer name : 'Intel IbexPeak HDMI'
     Components : 'HDA:10ec0272,10250487,00100001 HDA:80862804,80860101,00100000'
     Controls : 27
     Simple ctrls : 13
  Date: Fri May 18 07:51:58 2012
  HibernationDevice: RESUME=UUID=52f7a35f-fad8-4c9d-baf1-3d3087278f3c
  InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20120201.1)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 003: ID 064e:c21c Suyin Corp.
  MachineType: Acer Aspire 5742Z
  ProcEnviron:
   LANGUAGE=el:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=el_GR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=9ba52df4-ec9e-4e1c-bbd7-322f50437f94 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-24-generic N/A
   linux-backports-modules-3.2.0-24-generic N/A
   linux-firmware 1.79
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/10/2011
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.24
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire 5742Z
  dmi.board.vendor: Acer
  dmi.board.version: V1.24
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.24
  dmi.modalias: dmi:bvnAcer:bvrV1.24:bd08/10/2011:svnAcer:pnAspire5742Z:pvrV1.24:rvnAcer:rnAspire5742Z:rvrV1.24:cvnAcer:ct10:cvrV1.24:
  dmi.product.name: Aspire 5742Z
  dmi.product.version: V1.24
  dmi.sys.vendor: Acer

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