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[MegaBrutal <ubuntu@xxxxxxxxxxxxxx>]

Please try the patch mentioned here:
https://lkml.org/lkml/2014/12/1/790

If it works, it would be nice to tell the authors to get it included in the mainline kernel. I've already told them, but one man is probably not enough.
(I'm not sure if it's included already, and currently I have no time to test.)

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https://bugs.launchpad.net/bugs/1396889

Title:
  [Lenovo ThinkPad T400] kexec reboot fails

Status in linux package in Ubuntu:
  Triaged

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
  Trusty.

  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
  problems.

  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
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /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
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcEnviron:
   LANGUAGE=hu
   TERM=xterm
   PATH=(custom, no user)
   LANG=hu_HU.UTF-8
   SHELL=/bin/bash
  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.
  RelatedPackageVersions:
   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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