I confirm Timo's findings. vivid + upgrade (with udf) works, fresh xenial doesn't boot. Here is the diff between writable parts of the 2 installation. Left is vivid+upgrade, right is xenial.
I confirm Timo's findings. vivid + upgrade (with udf) works, fresh xenial doesn't boot. Here is the diff between writable parts of the 2 installation. Left is vivid+upgrade, right is xenial.