In Terminal app, as default user phablet I am doing su and getting Authentication failure for everything.
As per previous suggestions I have tried ubuntu, phablet, an empty password, and the current device PIN, all without success. I entered the PIN as the device Passphrase instead (in Lock security) and tried that, without success.
Ideas?
You can become root by typing
sudo suin the mobile terminal and providing the lockscreen password if required.This is a standard procedure which also works for the regular version of Ubuntu.
Try this: sudo -s That one has worked on my device.