Another work-around is given on tex.sx at http://tex.stackexchange.com/a/300259/1913 (cu’n{pasted below)
You can cure the bug by adding \usepackage{etoolbox} \makeatletter \patchcmd{\ttlh@hang}{\parindent\z@}{\parindent\z@\leavevmode}{}{} \patchcmd{\ttlh@hang}{\noindent}{}{}{} \makeatother after \usepackage{titlesec}. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574052 Title: titlesec does not render section numbers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/texlive-extra/+bug/1574052/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs