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[Bug 872895] Re: Acer AO522 brigtness level keys wrongly working


J.P.Casainho, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:

where VERSION-NUMBER is the version number of the kernel you tested. For example:

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:

If the mainline kernel does not fix this bug, please add the following tags:

As well, please remove the tag:

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your

** Tags added: latest-bios-1.12

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

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

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  Acer AO522 brigtness level keys wrongly working

Status in “linux” package in Ubuntu:

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

  Adjusting to lowest using keyboard and then starting increasing, I

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

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

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

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

  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
    bustype : BUS_I8042
    vendor  : 0x1
    product : 0x1
    version : 43841
    name    : "AT Translated Set 2 keyboard"
    phys    : "isa0060/serio0/input0"

  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

  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
  Uname: Linux 2.6.38-11-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 1: SB [HDA ATI SB], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC1:  cas        1291 F.... pulseaudio
  CRDA: Error: [Errno 2] Ficheiro ou directoria inexistente
   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
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
   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)
   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
   PATH=(custom, user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=3943dc11-8cff-4b5b-92b3-8ead749c9c82 ro quiet splash vt.handoff=7
   linux-restricted-modules-2.6.38-11-generic N/A
   linux-backports-modules-2.6.38-11-generic  N/A
   linux-firmware                             1.52
   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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