Jun  5 18:32:36 Intel kernel: [    0.076000] Kernel panic - not syncing: smp_callin: CPU1 started up but did not get a callout!
Jun  5 18:32:36 Intel kernel: [    0.076000] 
Jun  5 18:32:36 Intel kernel: [    0.076000] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.16.0-38-generic #52~14.04.1-Ubuntu
Jun  5 18:32:36 Intel kernel: [    0.076000] Hardware name: Apple Inc. MacBookPro5,4/Mac-F22587A1, BIOS    MBP53.88Z.00AC.B03.0906151647 06/15/09
Jun  5 18:32:36 Intel kernel: [    0.076000]  0000000000000000 ffff880234507eb0 ffffffff8176534f ffffffff81a6ff68
Jun  5 18:32:36 Intel kernel: [    0.076000]  ffff880234507f28 ffffffff8175d802 ffff880200000018 ffff880234507f38
Jun  5 18:32:36 Intel kernel: [    0.076000]  ffff880234507ed8 ffff880234507f28 ffffffff8180b000 0000000000000001
Jun  5 18:32:36 Intel kernel: [    0.076000] Call Trace:
Jun  5 18:32:36 Intel kernel: [    0.076000]  [<ffffffff8176534f>] dump_stack+0x45/0x56
Jun  5 18:32:36 Intel kernel: [    0.076000]  [<ffffffff8175d802>] panic+0xc8/0x1fc
Jun  5 18:32:36 Intel kernel: [    0.076000]  [<ffffffff810453e7>] start_secondary+0x2a7/0x2e0
Jun  5 18:32:36 Intel kernel: [    0.076000] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Jun  5 18:32:36 Intel kernel: [    0.076000] ---[ end Kernel panic - not syncing: smp_callin: CPU1 started up but did not get a callout!