kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Did this issue occur in a previous version of Ubuntu, or is this a new
issue?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.13 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".


Thanks in advance.


[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc4-trusty/

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

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

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https://bugs.launchpad.net/bugs/1285172

Title:
  Display brightness on internal monitor is set to minimum and can't be
  changed after plugin out the external monitor.

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I can reproduce it approx on 2 of 3 trials.

  1. Get the brightness up (not minimum) of the internal monitor
  2. Have an external monitor plugged in in the VGA cable
  3. unplug the external monitor
  -> the brightness of the internal monitor is set to minimum
  -> the fn keys to change the brightness don't work anymore (you are stuck to minimum brightness)

  workaround:
  - replug the external monitor and unplug it again
  -> then, you can most of the time, change the internal monitor brightness through the Fn keys.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-12-generic 3.13.0-12.32
  ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4
  Uname: Linux 3.13.0-12-generic x86_64
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  didrocks   2685 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Feb 26 15:11:38 2014
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=721253a1-6e55-4181-bc64-506c5987a191
  InstallationDate: Installed on 2012-05-28 (639 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: LENOVO 4287CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-12-generic root=UUID=a9f4b475-e4ce-45ed-aa33-9b92e52c49b0 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-12-generic N/A
   linux-backports-modules-3.13.0-12-generic  N/A
   linux-firmware                             1.125
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   
  dmi.bios.date: 02/14/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET58WW (1.28 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4287CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8DET58WW(1.28):bd02/14/2012:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4287CTO
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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