Retested on another Highbank system with Saucy just now. The more recent firmware seems to resolve the issue with the CPUs being offlined and not able to come back online.
>From dmesg: [ 3894.432615] CPU1: shutdown [ 3894.436773] CPU2: shutdown [ 3894.440941] CPU3: shutdown [ 3894.453726] CPU1: Booted secondary processor [ 3894.458250] CPU2: Booted secondary processor [ 3894.461382] CPU3: Booted secondary processor And from the certification cpu_offlining test: Beginning CPU Offlining Test Offlining cpu1 Offlining cpu2 Offlining cpu3 Onlining cpu1 Onlining cpu2 Onlining cpu3 Successfully turned 3 cores off and back on -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1185669 Title: CPU cores offline and can't be brought back up on ARM Server card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1185669/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
