This is the standard unix behaviour, I think. However, the "newgrp" command can be issued to effect the new group membership.
** Changed in: Ubuntu Status: Unconfirmed => Confirmed -- Adding group to user requires her to logout/login https://launchpad.net/bugs/38658 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs