kernel-packages team mailing list archive

[Anmar Oueja <anmar.oueja@xxxxxxxxxx>]

BTW, this command line option (acpi_backlight=vendor) fixes the
problem so I am now not sure if this is a bug or not.

On 6 September 2013 13:00, Anmar Oueja <anmar.oueja@xxxxxxxxxx> wrote:
> I will check 3.10 and earlier 3.11 RCs to see if I can narrow it down.
>
> On 6 September 2013 11:47, Joseph Salisbury
> <joseph.salisbury@xxxxxxxxxxxxx> wrote:
>> Did this issue start happening after an update/upgrade? Was there a
>> kernel version where you were not having this particular problem? This
>> will help determine if the problem you are seeing is the result of the
>> introduction of a regression, and when this regression was introduced.
>> If this is a regression, we can perform a kernel bisect to identify the
>> commit that introduced the problem.
>>
>> ** Changed in: linux (Ubuntu)
>>    Importance: Undecided => Medium
>>
>> ** Changed in: linux (Ubuntu)
>>        Status: Confirmed => Incomplete
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/1221795
>>
>> Title:
>>   brightness stepping is incorrect (double what it should be)
>>
>> Status in “linux” package in Ubuntu:
>>   Incomplete
>>
>> Bug description:
>>   Problem:  When I press the laptop screen brighteness, each step yield
>>   an event that is displayed on the OSD but the screen brightness
>>   doesn't change until the third press. Same happens for decreasing or
>>   increasing the brightness.
>>
>>   Exepcted behaviour: Each press of the brightness button on the laptop,
>>   yield a visible change in the brightness of the LCD scree.
>>
>>   Workaround: This seems documented and works perfectly. The work around
>>   is to type this in terminal:
>>
>>   sudo sh -c 'echo -n 0 >
>>   /sys/module/video/parameters/brightness_switch_enabled'
>>
>>   More details are here: http://askubuntu.com/questions/173921/why-does-
>>   my-thinkpad-brightness-control-skip-steps
>>
>>   I think this should be fixed in 13.10.
>>
>>   ProblemType: Bug
>>   DistroRelease: Ubuntu 13.10
>>   Package: linux-image-3.11.0-4-generic 3.11.0-4.9
>>   ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
>>   Uname: Linux 3.11.0-4-generic x86_64
>>   ApportVersion: 2.12.1-0ubuntu3
>>   Architecture: amd64
>>   AudioDevicesInUse:
>>    USER        PID ACCESS COMMAND
>>    /dev/snd/controlC0:  anmar      1798 F.... pulseaudio
>>   Date: Fri Sep  6 11:23:20 2013
>>   HibernationDevice: RESUME=UUID=2e39ee55-2a87-4298-a2d0-1c8ef5de5a96
>>   InstallationDate: Installed on 2013-08-09 (27 days ago)
>>   InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130809)
>>   MachineType: LENOVO 3443CTO
>>   MarkForUpload: True
>>   ProcFB: 0 inteldrmfb
>>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-4-generic.efi.signed root=UUID=1784df7c-8b5f-4550-84f2-13e73c2915fe ro quiet splash vt.handoff=7
>>   RelatedPackageVersions:
>>    linux-restricted-modules-3.11.0-4-generic N/A
>>    linux-backports-modules-3.11.0-4-generic  N/A
>>    linux-firmware                            1.113
>>   SourcePackage: linux
>>   UpgradeStatus: No upgrade log present (probably fresh install)
>>   dmi.bios.date: 04/29/2013
>>   dmi.bios.vendor: LENOVO
>>   dmi.bios.version: G6ET96WW (2.56 )
>>   dmi.board.asset.tag: Not Available
>>   dmi.board.name: 3443CTO
>>   dmi.board.vendor: LENOVO
>>   dmi.board.version: Win8 STD DPK TPG
>>   dmi.chassis.asset.tag: No Asset Information
>>   dmi.chassis.type: 10
>>   dmi.chassis.vendor: LENOVO
>>   dmi.chassis.version: Not Available
>>   dmi.modalias: dmi:bvnLENOVO:bvrG6ET96WW(2.56):bd04/29/2013:svnLENOVO:pn3443CTO:pvrThinkPadX1Carbon:rvnLENOVO:rn3443CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
>>   dmi.product.name: 3443CTO
>>   dmi.product.version: ThinkPad X1 Carbon
>>   dmi.sys.vendor: LENOVO
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1221795/+subscriptions

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1221795

Title:
  brightness stepping is incorrect (double what it should be)

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Problem:  When I press the laptop screen brighteness, each step yield
  an event that is displayed on the OSD but the screen brightness
  doesn't change until the third press. Same happens for decreasing or
  increasing the brightness.

  Exepcted behaviour: Each press of the brightness button on the laptop,
  yield a visible change in the brightness of the LCD scree.

  Workaround: This seems documented and works perfectly. The work around
  is to type this in terminal:

  sudo sh -c 'echo -n 0 >
  /sys/module/video/parameters/brightness_switch_enabled'

  More details are here: http://askubuntu.com/questions/173921/why-does-
  my-thinkpad-brightness-control-skip-steps

  I think this should be fixed in 13.10.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-4-generic 3.11.0-4.9
  ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
  Uname: Linux 3.11.0-4-generic x86_64
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  anmar      1798 F.... pulseaudio
  Date: Fri Sep  6 11:23:20 2013
  HibernationDevice: RESUME=UUID=2e39ee55-2a87-4298-a2d0-1c8ef5de5a96
  InstallationDate: Installed on 2013-08-09 (27 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130809)
  MachineType: LENOVO 3443CTO
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-4-generic.efi.signed root=UUID=1784df7c-8b5f-4550-84f2-13e73c2915fe ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-4-generic N/A
   linux-backports-modules-3.11.0-4-generic  N/A
   linux-firmware                            1.113
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/29/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G6ET96WW (2.56 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 3443CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 STD DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG6ET96WW(2.56):bd04/29/2013:svnLENOVO:pn3443CTO:pvrThinkPadX1Carbon:rvnLENOVO:rn3443CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 3443CTO
  dmi.product.version: ThinkPad X1 Carbon
  dmi.sys.vendor: LENOVO

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1221795/+subscriptions