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[Rohan Garg <rohan16garg@xxxxxxxxx>]

apport information

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https://bugs.launchpad.net/bugs/1250909

Title:
  [MacBookPro8,2] Trusty linux kernel 3.12.0-2 doesn't boot

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After upgrading from Saucy to Trusty, the 3.12.0-2 kernel doesn't
  fully boot on my machine. I have to use the older 3.11 kernel to boot.
  The 3.12.0 kernel tries to boot but then seems to fail at some stage.

  WORKAROUND: 3.13.0-5-generic boots fine if I pass:
  radeon.modeset=1 i915.modeset=0

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.12.0-2-generic 3.12.0-2.5
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.12.6-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  shadeslayer   2482 F.... pulseaudio
   /dev/snd/controlC0:  shadeslayer   2482 F.... pulseaudio
  Date: Wed Nov 13 16:56:49 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=0d23fd6f-b835-411a-af8b-c1d7a07cbf91
  InstallationDate: Installed on 2013-10-31 (12 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Apple Inc. MacBookPro8,2
  MarkForUpload: True
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: \boot\vmlinuz-3.11.0-12-generic ro root=UUID=ff872e15-889d-4f71-b33f-176cf27e2f12 initrd=boot\initrd.img-3.11.0-12-generic
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.117
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2013-10-31 (12 days ago)
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP81.88Z.0047.B27.1201241646
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-94245A3940C91C80
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro8,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-94245A3940C91C80
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,2:pvr1.0:rvnAppleInc.:rnMac-94245A3940C91C80:rvrMacBookPro8,2:cvnAppleInc.:ct10:cvrMac-94245A3940C91C80:
  dmi.product.name: MacBookPro8,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  --- 
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 14.04
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=78835c1e-3239-4400-a197-5a9e13dd5dd6
  InstallationDate: Installed on 2014-01-17 (12 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140116)
  MachineType: Apple Inc. MacBookPro8,2
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: \boot\vmlinuz-3.13.0-5-generic.efi.signed ro root=UUID=9c924b5c-ab48-4ac9-8987-383dff3ce194 initrd=boot\initrd.img-3.13.0-5-generic radeon.dpm=1 radeon.modeset=1 i915.modeset=0
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-5-generic N/A
   linux-backports-modules-3.13.0-5-generic  N/A
   linux-firmware                            1.122
  Tags:  trusty
  Uname: Linux 3.13.0-5-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-01-28 (1 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP81.88Z.0047.B27.1201241646
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-94245A3940C91C80
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro8,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-94245A3940C91C80
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,2:pvr1.0:rvnAppleInc.:rnMac-94245A3940C91C80:rvrMacBookPro8,2:cvnAppleInc.:ct10:cvrMac-94245A3940C91C80:
  dmi.product.name: MacBookPro8,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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