Bug still exists on Kubuntu 14.04, kernel vmlinuz-3.13.0-37-generic. Not on every boot, but well over half of them. After boot, second CPU (core) is not available.
l$ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 1 On-line CPU(s) list: 0 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s): 1 ... $ dmesg | grep -i smp ... [ 0.122618] smpboot: CPU0: Intel Pentium(R) Dual-Core CPU E6700 @ 3.20GHz (fam: 06, model: 17, stepping: 0a) [ 0.124000] x86: Booting SMP configuration: [ 10.202969] smpboot: CPU1: Not responding [ 10.203005] smpboot: Total of 1 processors activated (6399.96 BogoMIPS) [ 0.124000] Kernel panic - not syncing: smp_callin: CPU1 started up but did not get a callout! Having to repeat the boot several times in order to get both cores running is to my mins a major bug! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/823106 Title: Kernel panic - not syncing: smp_callin: CPU1 started up but did not get a callout on macbook running oneiric To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/823106/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
