For the record, I solved my issue: apt-get remove timekpr (it turned out broken settings in the parental controls silently denied permission. Strangely enough I could log on if the user was indicated as autologin)
For the record, I solved my issue: apt-get remove timekpr (it turned out broken settings in the parental controls silently denied permission. Strangely enough I could log on if the user was indicated as autologin)