Every time I power off my Dell XPS 13 9350 (running on Fedora 24), the shutdown hangs at 8 stop jobs. Seven of them are "A stop job is running for LVM PV..." and one of them is "A stop job is running for firewalld - dynamic firewall daemon" (which has a no limit at the time out time). Most of them are timed out after 1:30, two remain for like 4:30 after which the computer proceeds with shutdown. It seems like the luks containers cannot be properly closed, but I have some suspicion that it could be caused by the wifi driver too (for the Broadcom 4350 wireless card).
What is the cause of these stop jobs?
Any help would be appreciated!