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[Lewis Toohey <lewis@xxxxxxxxxxxx>]

Joseph

Many thanks for your response. I have installed and tested the bug
against the kernel installed by package:

linux-
image-3.15.0-031500rc4-generic_3.15.0-031500rc4.201405042135_amd64.deb

The problem remains identical to the standard Ubuntu kernel (as
described in my initial report).

I believe that I have added the tag "kernel-bug-exists-upstream" as
requested.

Many thanks

** Tags added: kernel-bug-exists-upstream

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

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

Title:
  Unable to adjust screen brightness on Acer Aspire V5-122P

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  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 tuns the screen on and off
  seemingly randomly.

  I believe this (rightly or wrongly) to be a problem with the hardware
  drivers for the laptop's touch screen (rather than with xorg or the
  open source AMD graphics drivers). I have therefore filed a bug report
  under "linux".

  Unfortunately I do not know how to determine the exact details of the
  touch screen. I have included the output of lspci below, but cannot
  see the screen listed. I am happy to gather further information with
  guidance.

  Many thanks

  OUTPUT FROM LSPCI

  00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Root Complex
  00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Temash [Radeon HD 8250/8280G]
  00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 9840
  00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
  00:02.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Functions 5:1
  00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 01)
  00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 40)
  00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
  00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
  00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 39)
  00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 39)
  00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 3a)
  00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 02)
  00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
  00:14.7 SD Host controller: Advanced Micro Devices, Inc. [AMD] FCH SD Flash Controller (rev 01)
  00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 0
  00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 1
  00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 2
  00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 3
  00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 4
  00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h Processor Function 5
  01:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)

  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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