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[Bug 941286] Re: Setting brightness doesn't work out of the box on Acer Extensa 5235

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: "Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>
Date: Tue, 12 Nov 2013 03:46:27 -0000
Reply-to: Bug 941286 <941286@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Bence Lukács, 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, but the one all the way at the bottom) 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:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.12

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:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

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
understanding.


** Description changed:

- I use this laptop since 10.04 and I always have to write something into /etc/default/grub, to solve this problem.
- Now on precise it is properly working if I write "acpi_backlight=vendor" to this line:
- GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
- Is it possible to fix this bug, to work the brightness change out of the box?
- I really hope it is.
- It doesn't work since 2009.06.27.
- These are the bugs which is connected to this problem:
- https://bugs.launchpad.net/ubuntu/+source/acpid/+bug/392948
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/489041
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/518002
- https://bugs.launchpad.net/ubuntu/+bug/773820
- I hope I attached everything which necessary, if not please let me know what I should send.
+ I use this laptop since 10.04 and I always have to write something into
+ /etc/default/grub, to solve this problem.
+ 
+ WORKAROUND: Use kernel parameter:
+ acpi_backlight=vendor
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-17-generic-pae 3.2.0-17.27
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
  Uname: Linux 3.2.0-17-generic-pae i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.93-0ubuntu2
  Architecture: i386
  ArecordDevices:
-  **** List of CAPTURE Hardware Devices ****
-  card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
-    Subdevices: 1/1
-    Subdevice #0: subdevice #0
+  **** List of CAPTURE Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  lukibeni   1665 F.... pulseaudio
-  /dev/snd/pcmC0D0p:   lukibeni   1665 F...m pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  lukibeni   1665 F.... pulseaudio
+  /dev/snd/pcmC0D0p:   lukibeni   1665 F...m pulseaudio
  Card0.Amixer.info:
-  Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 45'
-    Mixer name	: 'Conexant CX20561 (Hermosa)'
-    Components	: 'HDA:14f15051,10250253,00100000'
-    Controls      : 18
-    Simple ctrls  : 12
+  Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 45'
+    Mixer name	: 'Conexant CX20561 (Hermosa)'
+    Components	: 'HDA:14f15051,10250253,00100000'
+    Controls      : 18
+    Simple ctrls  : 12
  Date: Sun Feb 26 09:19:11 2012
  HibernationDevice: RESUME=UUID=9e4f77a4-98e9-48ec-97e5-07dc5ae08872
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120201.1)
  MachineType: Acer Extensa 5235
  ProcEnviron:
-  TERM=xterm
-  PATH=(custom, no user)
-  LANG=hu_HU.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm
+  PATH=(custom, no user)
+  LANG=hu_HU.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic-pae root=UUID=5b2cd82c-58ab-45e6-9719-02f98b6c857b ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.2.0-17-generic-pae N/A
-  linux-backports-modules-3.2.0-17-generic-pae  N/A
-  linux-firmware                                1.71
+  linux-restricted-modules-3.2.0-17-generic-pae N/A
+  linux-backports-modules-3.2.0-17-generic-pae  N/A
+  linux-firmware                                1.71
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/09/2009
  dmi.bios.vendor: Phoenix
  dmi.bios.version: V0.3216
  dmi.board.name: BA50-MV
  dmi.board.vendor: Acer
  dmi.board.version: Not Applicable
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenix:bvrV0.3216:bd06/09/2009:svnAcer:pnExtensa5235:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Extensa 5235
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Acer

** Tags added: bios-outdated-3310 needs-upstream-testing

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

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

-- 
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https://bugs.launchpad.net/bugs/941286

Title:
  Setting brightness doesn't work out of the box on Acer Extensa 5235

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I use this laptop since 10.04 and I always have to write something
  into /etc/default/grub, to solve this problem.

  WORKAROUND: Use kernel parameter:
  acpi_backlight=vendor

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-17-generic-pae 3.2.0-17.27
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
  Uname: Linux 3.2.0-17-generic-pae i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.93-0ubuntu2
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lukibeni   1665 F.... pulseaudio
   /dev/snd/pcmC0D0p:   lukibeni   1665 F...m pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 45'
     Mixer name	: 'Conexant CX20561 (Hermosa)'
     Components	: 'HDA:14f15051,10250253,00100000'
     Controls      : 18
     Simple ctrls  : 12
  Date: Sun Feb 26 09:19:11 2012
  HibernationDevice: RESUME=UUID=9e4f77a4-98e9-48ec-97e5-07dc5ae08872
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120201.1)
  MachineType: Acer Extensa 5235
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=hu_HU.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic-pae root=UUID=5b2cd82c-58ab-45e6-9719-02f98b6c857b ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-17-generic-pae N/A
   linux-backports-modules-3.2.0-17-generic-pae  N/A
   linux-firmware                                1.71
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/09/2009
  dmi.bios.vendor: Phoenix
  dmi.bios.version: V0.3216
  dmi.board.name: BA50-MV
  dmi.board.vendor: Acer
  dmi.board.version: Not Applicable
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenix:bvrV0.3216:bd06/09/2009:svnAcer:pnExtensa5235:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Extensa 5235
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Acer

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