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[Jens <jens-launchpad.net@xxxxxxxxxxxxxxx>]

I have installed the mainline kernel, but how do I provoke the series of
operations that caused this bug, ie. a kernel update with subsequent
'Oops' in (I suppose) the 'efi' module?

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https://bugs.launchpad.net/bugs/1491615

Title:
  Updating shim-signed freezes computer during postinstall

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When performing an update using ubuntu's default GUI tool, during the
  "configuring shim-signed" message, the computer freezes and needs to
  be reset. Unfortunately, there is nothing in the system log except for
  corruption (a lot of null bytes). But I experience these hard freezes
  regularly, whenever a GRUB or EFI related package is being updated,
  always during postinstall.

  [    0.000000] efi: EFI v2.31 by American Megatrends
  [    0.000000] efi:  ESRT=0xd9f7f998  ACPI=0xd8f97000  ACPI 2.0=0xd8f97000  SMBIOS=0xf04d0  MPS=0xfd510 
  [    0.000000] esrt: Reserving ESRT space from 0x00000000d9f7f998 to 0x00000000d9f7f9d0.
  [    0.000000] SMBIOS 2.8 present.
  [    0.000000] DMI: MSI MS-7817/CSM-B85M-E45 (MS-7817), BIOS V10.9 04/21/2015
  Linux kiste 3.19.0-26-generic #28~14.04.1-Ubuntu SMP Wed Aug 12 14:09:17 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  This bug exists and keeps reappearing since I originally installed
  Ubuntu 14.04. However, for some reason it does not happen with a very
  similar second machine. This machine does not load the 'efi' kernel
  module on boot, can this be the reason?

  [    0.000000] SMBIOS 2.8 present.
  [    0.000000] DMI: MSI MS-7817/H81M-P33 (MS-7817), BIOS V1.5 05/30/2014
  Linux desktop 3.19.0+ #6 SMP Sat Feb 21 20:08:01 CET 2015 x86_64 x86_64 x86_64 GNU/Linux

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: shim-signed 1.9+0.8-0ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-26.28~14.04.1-generic 3.19.8-ckt4
  Uname: Linux 3.19.0-26-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Sep  2 09:33:16 2015
  SourcePackage: shim-signed
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.13
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jens       2628 F.... pulseaudio
   /dev/snd/controlC0:  jens       2628 F.... pulseaudio
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=/dev/mapper/linuxkiste--vg-swap_1
  IwConfig:
   p2p1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: MSI MS-7817
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=de_DE
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-28-generic root=/dev/mapper/hostname--vg-root ro splash quiet netconsole=6666@192.168.178.59/p2p1,6665@192.168.178.62/ vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-28.30~14.04.1-generic 3.19.8-ckt5
  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-3.19.0-28-generic N/A
   linux-backports-modules-3.19.0-28-generic  N/A
   linux-firmware                             1.127.15
  RfKill:
   
  Tags:  trusty
  Uname: Linux 3.19.0-28-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 04/21/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V10.9
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: CSM-B85M-E45 (MS-7817)
  dmi.board.vendor: MSI
  dmi.board.version: 2.0
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 2.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV10.9:bd04/21/2015:svnMSI:pnMS-7817:pvr2.0:rvnMSI:rnCSM-B85M-E45(MS-7817):rvr2.0:cvnMSI:ct3:cvr2.0:
  dmi.product.name: MS-7817
  dmi.product.version: 2.0
  dmi.sys.vendor: MSI

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