Joseph, I can understand what upstream kernel version I should install
to test.

http://kernel.ubuntu.com/~kernel-ppa/mainline/

My Ubuntu is Natty and I can see kernel builds for Oneiric, which are
the latest ones.... Could you please point me to the correct
version/link I should try?

Thanks.

** Description changed:

  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
+   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
  
- NOTE: Acer AO522 have an embedded controller. I documented some findings
- here: https://help.ubuntu.com/community/AspireOne522
+ 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
+  **** 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
+  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
+  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]
+  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
+  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
+  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
+  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
+  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
+  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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https://bugs.launchpad.net/bugs/872895

Title:
  Acer AO522 brigtness level keys wrongly working

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