I've also tested an upgrade of a Trusty desktop to Xenial and while the upgrade is in progress, it has gotten past the failure to calculate the upgrade. Subsequently, I'm marking the kmod task as Invalid. It'd still be good to get mvo's apt fix added in some form and make ubuntu-release-upgrader more informative as to the failure.
I've also tested an upgrade of a Trusty desktop to Xenial and while the upgrade is in progress, it has gotten past the failure to calculate the upgrade. Subsequently, I'm marking the kmod task as Invalid. It'd still be good to get mvo's apt fix added in some form and make ubuntu- release- upgrader more informative as to the failure.