@David or anyone else having this problem, I too didn't have any luck with "nmcli nm sleep false" in my script under /etc/pm/sleep.d/ either but when I used "service network-manager restart" instead it worked flawlessly. I have not had any problems for almost five months and it doesn't cause any side effects.
I've added the script that I use to this post. ** Attachment added: "Script for restarting networking manager on resume" https://bugs.launchpad.net/ubuntu/+source/systemd-shim/+bug/1252121/+attachment/4195364/+files/10_restart-networkmanager -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1252121 Title: missing PrepareForSleep signal after resuming, causing networking to stay disabled To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/1252121/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs