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[Launchpad Bug Tracker <872895@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/872895

Title:
  Acer AO522 brigtness level keys wrongly working

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  When I change LCD backlight value using Fn + left/right keys, the
  backlight change in 3 steps each time where it should
  increase/decrease at 1 step.

  NOTE: This bug just happens when I used OpenSource ATI video drivers.
  If I use proprietary there is no bug.

  Max value is:
  root@cas-netbook:/home/cas# cat /sys/class/backlight/acpi_video0/max_brightness
  9

  Adjusting to lowest using keyboard and then starting increasing, I
  get:

  root@cas-netbook:/home/cas# cat /sys/class/backlight/acpi_video0/brightness
  0

  root@cas-netbook:/home/cas# cat /sys/class/backlight/acpi_video0/brightness
  3

  root@cas-netbook:/home/cas# cat /sys/class/backlight/acpi_video0/brightness
  6

  root@cas-netbook:/home/cas# cat /sys/class/backlight/acpi_video0/brightness
  9

  If I continue to increase with keyboard, the brightness value don't
  increase more then value 9.

  And, If I echo value 1 to brightness, increasing with keyboard, I cat
  the brightness and I get value 4, instead value 3 if brightness
  started with value 0.

  I simple don't get any event when I use the brightness key
  combination: Fn + arrow left/right. Here is an example of what I got:

  root@cas-netbook:/home/cas# input-events 4
  /dev/input/event4
    bustype : BUS_I8042
    vendor  : 0x1
    product : 0x1
    version : 43841
    name    : "AT Translated Set 2 keyboard"
    phys    : "isa0060/serio0/input0"
    bits ev : EV_SYN EV_KEY EV_MSC EV_LED EV_REP

  waiting for events
  09:56:29.503685: EV_MSC MSC_SCAN 28
  09:56:29.503705: EV_KEY KEY_ENTER (0x1c) released
  09:56:29.503707: EV_SYN code=0 value=0
  09:56:31.923075: EV_MSC MSC_SCAN 205
  09:56:31.923095: EV_KEY KEY_RIGHT (0x6a) pressed
  09:56:31.923097: EV_SYN code=0 value=0
  ^[[C09:56:31.994063: EV_MSC MSC_SCAN 205
  09:56:31.994081: EV_KEY KEY_RIGHT (0x6a) released
  09:56:31.994083: EV_SYN code=0 value=0
  09:56:32.704639: EV_MSC MSC_SCAN 203
  09:56:32.704660: EV_KEY KEY_LEFT (0x69) pressed
  09:56:32.704663: EV_SYN code=0 value=0
  ^[[D09:56:32.812767: EV_MSC MSC_SCAN 203
  09:56:32.812787: EV_KEY KEY_LEFT (0x69) released
  09:56:32.812789: EV_SYN code=0 value=0
  timeout, quitting

  And ACPI LISTEN:
  root@cas-netbook:/home/cas# acpi_listen
  video LCD 00000086 00000000
  video LCD 00000087 00000000

  
  NOTE: Acer AO522 have an embedded controller. I documented some findings here: https://help.ubuntu.com/community/AspireOne522

  NOTE: Acer AO722 should be the same hardware as AO522 (AO722 have a
  resolution LCD of 1366x728 on a 11.6'' LCD while AO522 have a 1280x720
  on a 10.1'' LCD).

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: linux-image-2.6.38-11-generic 2.6.38-11.50
  ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
  Uname: Linux 2.6.38-11-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: SB [HDA ATI SB], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  cas        1291 F.... pulseaudio
  CRDA: Error: [Errno 2] Ficheiro ou directoria inexistente
  Card0.Amixer.info:
   Card hw:0 'Generic'/'HD-Audio Generic at 0xf0444000 irq 41'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 4
     Simple ctrls  : 1
  Card0.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Card1.Amixer.info:
   Card hw:1 'SB'/'HDA ATI SB at 0xf0440000 irq 16'
     Mixer name	: 'Conexant CX20584'
     Components	: 'HDA:14f15068,10250543,00100302'
     Controls      : 9
     Simple ctrls  : 6
  Date: Wed Oct 12 15:34:58 2011
  HibernationDevice: RESUME=UUID=5c9f6002-3db8-4b1f-9b29-874d574b7188
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  Lsusb:
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 002: ID 0402:7675 ALi Corp.
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Acer Aspire One 522
  ProcEnviron:
   LANGUAGE=pt:en
   PATH=(custom, user)
   LANG=pt_PT.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=3943dc11-8cff-4b5b-92b3-8ead749c9c82 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-2.6.38-11-generic N/A
   linux-backports-modules-2.6.38-11-generic  N/A
   linux-firmware                             1.52
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/08/2011
  dmi.bios.vendor: Acer
  dmi.bios.version: V1.12
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: JE10-BZ
  dmi.board.vendor: Acer
  dmi.board.version: Base Board Version
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.12
  dmi.modalias: dmi:bvnAcer:bvrV1.12:bd06/08/2011:svnAcer:pnAspireOne522:pvrV1.12:rvnAcer:rnJE10-BZ:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.12:
  dmi.product.name: Aspire One 522
  dmi.product.version: V1.12
  dmi.sys.vendor: Acer

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