I changed my password from the unity8 desktop session by:
1. Navigating to Settings->Security->Locking->Lock Security,
2. Selecting "Swipe",
3. Selecting "Passphrase",
4. Then logged out and in again.
Following this I saw some really weird behaviour whereby my UbuntuOne account kept being removed upon trying to install something from the store scope.
I eventually found that my user account had been moved to the nopasswdlogin group. On removing myself from the group, things started working again with the store & U1.
So my guess is that by selecting "Swipe" my user is moved to nopasswdlogin, but is not removed upon selecting "Passphrase" again.
I changed my password from the unity8 desktop session by: >Security- >Locking- >Lock Security,
1. Navigating to Settings-
2. Selecting "Swipe",
3. Selecting "Passphrase",
4. Then logged out and in again.
Following this I saw some really weird behaviour whereby my UbuntuOne account kept being removed upon trying to install something from the store scope.
I eventually found that my user account had been moved to the nopasswdlogin group. On removing myself from the group, things started working again with the store & U1.
So my guess is that by selecting "Swipe" my user is moved to nopasswdlogin, but is not removed upon selecting "Passphrase" again.