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[Bug 1396889] Re: kexec reboot fails


MegaBrutal, the next step is to fully commit bisect from kernel 3.13 to
3.16 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue.  Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ? Please note,
finding adjacent kernel versions is not fully commit bisecting.

Thank you for your understanding.

Helpful bug reporting tips:

** Tags removed: bios-outdated-3.24
** Tags added: latest-bios-3.24

** Changed in: linux (Ubuntu)
   Importance: Low => Medium

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

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  kexec reboot fails

Status in linux package in Ubuntu:

Bug description:
  After release upgrade to Utopic, when I reboot with kexec (simply with
  "reboot" command), my computer cold reboots after "Starting new
  kernel" (i.e. I need to get through the POST and GRUB), instead of the
  new kernel being loaded. Previously I didn't experience problems with

  It matters which kernel I try to boot, while it doesn't matter what
  kernel I kexec from, and which version of kexec-tools I have.

  I can't boot 3.16.0-25, nor 3.18.0-031800rc6 from any installed
  kernels, while I can boot 3.13.0-39 from any kernels without any

  I tried to downgrade kexec-tools from 1:2.0.7-1ubuntu2 (utopic) to
  1:2.0.6-0ubuntu2.1 (trusty), but it made no difference.

  I have a Lenovo Thinkpad T400. I didn't experience the same on my
  other machines, so I suspect some hardware-dependent issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-25-generic 3.16.0-25.33
  ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
   /dev/snd/controlC0:  megabrutal   2497 F.... pulseaudio
   /dev/snd/seq:        timidity   1420 F.... timidity
  Date: Thu Nov 27 07:40:07 2014
  HibernationDevice: RESUME=UUID=3d113c6f-7cf8-477f-81e1-857aa62102c2
  InstallationDate: Installed on 2014-06-10 (169 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 6474B84
   Socket 0:
     no product info available
   Socket 0:
     no card
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-25-generic root=/dev/mapper/thinkvg-rootlv ro rootflags=subvol=@
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
   linux-restricted-modules-3.16.0-25-generic N/A
   linux-backports-modules-3.16.0-25-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-11-11 (15 days ago)
  dmi.bios.date: 04/22/2009
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7UET66WW (2.16 )
  dmi.board.name: 6474B84
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr7UET66WW(2.16):bd04/22/2009:svnLENOVO:pn6474B84:pvrThinkPadT400:rvnLENOVO:rn6474B84:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 6474B84
  dmi.product.version: ThinkPad T400
  dmi.sys.vendor: LENOVO

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