kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Did this issue occur in a previous version of Ubuntu, or is this a new
issue?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.18 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc7-vivid/

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

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

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https://bugs.launchpad.net/bugs/1399611

Title:
  Screen brightness not working acer aspire 5742

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  My laptop does not respond to the screen brightness control after default Ubuntu install. The following workaround worked: http://askubuntu.com/a/450594
  It adds a config file to /usr/share/X11/xorg.conf.d/

  adding acpi_backlight=vendor to boot params did nothing
  adding acpi_osi=Linux to boot params only fixed the keyboard shortcuts, but the screen indicator and the brightness settings dialog stopped working.

  Please let me know if this is not the right package, or if you need
  more info.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-40-generic 3.13.0-40.69
  ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
  Uname: Linux 3.13.0-40-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lies       2944 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Dec  5 12:06:41 2014
  HibernationDevice: RESUME=UUID=36715a89-8cd7-40cd-8d29-94f983036914
  InstallationDate: Installed on 2014-11-23 (11 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lsusb:
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 003: ID 04f2:b1d8 Chicony Electronics Co., Ltd 
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Acer Aspire 5742
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-40-generic root=UUID=1bc3ee22-b016-4fcc-9668-30363b56faa9 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-40-generic N/A
   linux-backports-modules-3.13.0-40-generic  N/A
   linux-firmware                             1.127.10
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/11/2010
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.04
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire 5742
  dmi.board.vendor: Acer
  dmi.board.version: V1.04
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.04
  dmi.modalias: dmi:bvnAcer:bvrV1.04:bd08/11/2010:svnAcer:pnAspire5742:pvrV1.04:rvnAcer:rnAspire5742:rvrV1.04:cvnAcer:ct10:cvrV1.04:
  dmi.product.name: Aspire 5742
  dmi.product.version: V1.04
  dmi.sys.vendor: Acer

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