kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I'd like to perform a bisect to figure out what commit caused this
regression. We need to identify the earliest kernel where the issue
started happening as well as the latest kernel that did not have this
issue.

Can you test the following kernels and report back? We are looking for
the first kernel version that exhibits this bug:

v3.12 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-trusty/
If v3.12 final does not exhibit the bug, we should move on to testing some of the v3.13 release candidates. 

v3.13-rc3: http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.13-rc3-trusty/

If v3.13-rc3 does not exhibit the bug then test v3.13-rc6:
v3.13-rc6: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc6-trusty/

If v3.13-rc3 does exhibit the bug then test v3.13-rc2:
v3.13-rc2: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc2-trusty

You don't have to test every kernel, just up until the kernel that first
has this bug.

Thanks in advance!

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

** Tags added: performing-bisect

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https://bugs.launchpad.net/bugs/1309584

Title:
  [HP EliteBook Folio 9470m Notebook PC] Backlight does not work on
  intel driver after upgrade from 13.10 -> 14.04, acpi_backlight=vendor
  solves

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  I am running on an HP EliteBook Folio 9470m which has an i915 video
  chipset.

  After upgrading to 14.04, the backlight and brightness controls do not
  work on the laptop screen.

  $ sudo intel_backlight 
  current backlight value: 4%

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Fri Apr 18 08:02:05 2014
  DistUpgraded: 2014-04-18 01:03:05,027 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus: openvswitch, 2.0.1+git20140120: added
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:18df]
  InstallationDate: Installed on 2013-01-14 (459 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64+mac (20121017.3)
  MachineType: Hewlett-Packard HP EliteBook Folio 9470m
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu-root ro quiet splash "acpi_osi=!Windows 2012" vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (0 days ago)
  dmi.bios.date: 09/24/2012
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68IBD Ver. F.30
  dmi.board.name: 18DF
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 62.13
  dmi.chassis.asset.tag: CNU2439PZT
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68IBDVer.F.30:bd09/24/2012:svnHewlett-Packard:pnHPEliteBookFolio9470m:pvrA1029D1103:rvnHewlett-Packard:rn18DF:rvrKBCVersion62.13:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook Folio 9470m
  dmi.product.version: A1029D1103
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Fri Apr 18 01:04:29 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                5239 
   vendor                                     CMN
  xserver.version: 2:1.15.1-0ubuntu2

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