kernel-packages team mailing list archive

[Mark - Syminet <1315834@xxxxxxxxxxxxxxxxxx>]

Also Confirmed - vendor issue, not Ubuntu - BIOS upgrade fixed
brightness / suspend issues as well for me.  Everything now works
flawlessly.

A bit OT but in case others arrive here via google: the V5-122P BIOS
updates *require* you to be running Windows 8 or newer.  If you aren't
dual booting into Windows, Acer forcing a Windows 8 binary in order to
update the BIOS makes for a *very* bad day.  FreeDOS does not work, not
even WindowsPE on 32-bit works - it has to be Windows 8.

Note being, when looking to buy hardware in the future not only will be
googling linux compatability, but also checking to make sure  the vendor
is releasing BIOS patches which are easily installed using Linux as
well.

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https://bugs.launchpad.net/bugs/1315834

Title:
  1002:983d [Acer Aspire V5-122P] Unable to adjust screen brightness
  using Radeon driver

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  While using the Radeon driver, I am unable to adjust the screen
  brightness on my Acer Aspire V5-122P. Adjusting brightness in the
  settings applet has no affect. Adjusting brightness with the keyboard
  function keys turns the screen on and off seemingly randomly.

  WORKAROUND: sudo -s
  cd /sys/class/backlight/radeon_bl0
  cat max_brightness
  echo 200 > brightness #Example
  echo 10 > brightness #Example
  echo 255 > brightness #Example

  Upstream post URL: http://www.spinics.net/lists/linux-
  acpi/msg50719.html

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  lewis      2240 F.... pulseaudio
   /dev/snd/controlC0:  lewis      2240 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun May  4 10:55:50 2014
  HibernationDevice: RESUME=UUID=42931b07-a2e1-49a1-9780-874e1d4300b7
  InstallationDate: Installed on 2014-04-14 (19 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  MachineType: Acer Aspire V5-122P
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=8a594eb2-ccc3-4aa4-a4c5-e872f4033b04 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/18/2013
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.08
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Aspire V5-122P
  dmi.board.vendor: Acer
  dmi.board.version: V2.08
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V2.08
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.08:bd07/18/2013:svnAcer:pnAspireV5-122P:pvrV2.08:rvnAcer:rnAspireV5-122P:rvrV2.08:cvnAcer:ct10:cvrV2.08:
  dmi.product.name: Aspire V5-122P
  dmi.product.version: V2.08
  dmi.sys.vendor: Acer

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