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[richard jones <richard.jones.1952@xxxxxxxxx>]

On my Acer Aspire 5920 I installed and successfully booted :
linux-image-3.19.8-031908-generic_3.19.8-031908.201505110938_amd64.
So this boot bug may be fixed.
I may have scrambled my grub as I needed to run grub-mkconfig to get the grub start menu updated to include the new kernel.
Part of my bios update journey requested above but not yet complete. Required an old 2008 vintage windows HDD to be resurrected.

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https://bugs.launchpad.net/bugs/1453542

Title:
  15.04 with 3.19.0-17 kernel boot failure

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  An Acer Aspire 5920 with Ubuntu 15.04 kernel 3.19.0-17-generic fails boot up going unresponsive very early in the sequence.
  I installed the upstream kernel packages on my Acer Aspire 5920 laptop:
  linux-headers-4.1.0-040100rc2-generic_4.1.0-040100rc2.201505032335_amd64.deb
  linux-image-4.1.0-040100rc2-generic_4.1.0-040100rc2.201505032335_amd64.deb
  The machine booted successfully 3 times with warnings about installed packages having unmet dependencies.
  uname -r command confirmed that the expected kernel was running: 4.1.0-040100rc2-generic

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-16-generic 3.19.0-16.16
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  richard    1880 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon May 11 00:49:15 2015
  HibernationDevice: RESUME=UUID=f08d2e82-db26-49b2-b688-4df3cc5f0762
  InstallationDate: Installed on 2015-01-08 (122 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Acer, inc. Aspire 5920
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=bf544740-121f-4cd5-90fe-07cbe21fd0a2 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-16-generic N/A
   linux-backports-modules-3.19.0-16-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (16 days ago)
  dmi.bios.date: 03/14/2008
  dmi.bios.vendor: Acer
  dmi.bios.version: v1.3811
  dmi.board.name: Chapala
  dmi.board.vendor: Acer, Inc.
  dmi.board.version: Not Applicable
  dmi.chassis.type: 1
  dmi.chassis.vendor: Acer, Inc.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAcer:bvrv1.3811:bd03/14/2008:svnAcer,inc.:pnAspire5920:pvrNotApplicable:rvnAcer,Inc.:rnChapala:rvrNotApplicable:cvnAcer,Inc.:ct1:cvrN/A:
  dmi.product.name: Aspire 5920
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Acer, inc.

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