We ran into this while setting up an OpenStack cloud using IBM POWER8 machines[1]. Unfortunately, hwe-v for Trusty isn't available (LP:1504066) but hwe-u does indeed fix the "Oops: Exception in kernel mode, sig: 4 [#47]" boot loop we ran into.
Since it's been advised here, and in several other bugs that POWER8/ppc64el doesn't work with the main Trusty 3.13 kernel, perhaps we could make MAAS images default to hwe-u and above for ppc64el?
We ran into this while setting up an OpenStack cloud using IBM POWER8 machines[1]. Unfortunately, hwe-v for Trusty isn't available (LP:1504066) but hwe-u does indeed fix the "Oops: Exception in kernel mode, sig: 4 [#47]" boot loop we ran into.
Since it's been advised here, and in several other bugs that POWER8/ppc64el doesn't work with the main Trusty 3.13 kernel, perhaps we could make MAAS images default to hwe-u and above for ppc64el?
[1]http:// paste.ubuntu. com/12713436/