kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Frans Elliott, thank you for reporting this and helping make Ubuntu better. Could you please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1411884

** Package changed: linux-lts-utopic (Ubuntu) => linux (Ubuntu)

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

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

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1411884

Title:
  not all CPU cores loaded during boot

Status in linux package in Ubuntu:
  Incomplete

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1411884/+subscriptions