not all CPU cores loaded during boot

[Frans Elliott]

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.

[penalvch (penalvch)]

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

[Launchpad Janitor (janitor)]

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