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[Launchpad Bug Tracker <1411884@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1411884

Title:
  not all CPU cores loaded during boot

Status in linux package in Ubuntu:
  Expired

Bug description:
  During boot, at dmesg timestamp 0, the kernel complains about fast TSC
  calibration failed. Then at around timestamp 7.9 the kernel complains
  about smpboot: CPU1: Not responding. After some more time, it will
  also say CPU2 and CPU3 aren't responding either. The computer proceeds
  to boot successfully, but only using 1 CPU core out of my quad core
  CPU (and as you might guess this makes it rather slow). According to
  /proc/cpuinfo my computer only recognizes a single core on my
  computer.

  Here's the output of uname -a
  Linux <Hostname> 3.16.0-29-generic #39-Ubuntu SMP Mon Dec 15 22:27:29 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  I'll attach dmesg and lspci outputs as well. I've also attached my
  /proc/cpuinfo file as it proves that my computer only recognizes one
  of my 4 cores.

  Also, this problem is absent on the 3.16.0-23 kernel.

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