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[Cyton <1503842@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1503655 ***
    https://bugs.launchpad.net/bugs/1503655

well i can boot. but after lock screen (either login or guest) system
completely hangs. (14.04.3 Trusty) - Using laptop e7240 i5 Vpro.


Way to fix: CTRL+ALT+f1 on login screen to drop to cmd prompt.

Login & edit /etc/default/grub to put a # before the two "Hidden"
options.

save + Exit

Sudo update-grub.

Reboot with new previous kernel (3.19.0.30) from grub advanced menu. and
afterwords purge the 3.19.0.31 kernel from system

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https://bugs.launchpad.net/bugs/1503842

Title:
  Linux image 3.19.0.31 broken

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Contrary to my previous message, the kernel 3.19.0.31 is completely
  broke.

  Sound card either not found or replaced by a "Dummy device" (producing no sounds whatsoever)
  Network Manager nm-applet Icon not shown in the task bar (network connection sometimes works, sometimes does not connect)

  It seems that the bootup mechanism does not load all neccessary
  modules

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-generic 3.19.0.31.30
  ProcVersionSignature: Ubuntu 3.19.0-31.35-generic 3.19.8-ckt7
  Uname: Linux 3.19.0-31-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D8p', '/dev/snd/pcmC1D7p', '/dev/snd/pcmC1D3p', '/dev/snd/controlC1', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/timer', '/dev/snd/seq'] failed with exit code 1:
  Date: Wed Oct  7 21:16:31 2015
  HibernationDevice: RESUME=UUID=82dd2ca4-5c1e-43dc-b83e-d93e6166e5c4
  InstallationDate: Installed on 2013-05-17 (872 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64+mac (20130424)
  MachineType: Apple Inc. MacBookPro10,1
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-31-generic root=UUID=3679e976-6405-4981-aa99-8c79d15e6aa3 ro quiet splash vt.handoff=7
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-31-generic N/A
   linux-backports-modules-3.19.0-31-generic  N/A
   linux-firmware                             1.143.4
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-25 (165 days ago)
  dmi.bios.date: 12/21/2012
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP101.88Z.00EE.B03.1212211437
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-C3EC7CD22292981F
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro10,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-C3EC7CD22292981F
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP101.88Z.00EE.B03.1212211437:bd12/21/2012:svnAppleInc.:pnMacBookPro10,1:pvr1.0:rvnAppleInc.:rnMac-C3EC7CD22292981F:rvrMacBookPro10,1:cvnAppleInc.:ct10:cvrMac-C3EC7CD22292981F:
  dmi.product.name: MacBookPro10,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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