Comment # 4 on bug 1075878 from 
JOURNALCTL entries around the incident time:

Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.3671] device
(wlp3s0): state change: activated -> deactivating (reason 'user-requested',
internal state 'managed')
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.3672] manager:
NetworkManager state is now DISCONNECTING
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.3700] audit:
op="connection-deactivate" uuid="bbaf9de8-dfaa-4637-86ff-d555a0d9b82d"
name="<REDACTED ESSID>" pid=6133 uid=1000 result="success"
Jan 13 13:52:06 laptop dbus-daemon[989]: [system] Activating via systemd:
service name='org.freedesktop.nm_dispatcher'
unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.6' (uid=0
pid=1162 comm="/usr/sbin/NetworkManager --no-daemon ")
Jan 13 13:52:06 laptop systemd[1]: Starting Network Manager Script Dispatcher
Service...
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.3736] device
(wlp3s0): state change: deactivating -> disconnected (reason 'user-requested',
internal state 'managed')
Jan 13 13:52:06 laptop avahi-daemon[974]: Withdrawing address record for
<REDACTED IP-ADDRESS> on wlp3s0.
Jan 13 13:52:06 laptop avahi-daemon[974]: Leaving mDNS multicast group on
interface wlp3s0.IPv6 with address <REDACTED IP-ADDRESS>.
Jan 13 13:52:06 laptop avahi-daemon[974]: Interface wlp3s0.IPv6 no longer
relevant for mDNS.
Jan 13 13:52:06 laptop dbus-daemon[989]: [system] Successfully activated
service 'org.freedesktop.nm_dispatcher'
Jan 13 13:52:06 laptop systemd[1]: Started Network Manager Script Dispatcher
Service.
Jan 13 13:52:06 laptop nm-dispatcher[6137]: req:1 'connectivity-change': new
request (4 scripts)
Jan 13 13:52:06 laptop nm-dispatcher[6137]: req:1 'connectivity-change': start
running ordered scripts...
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.4117] dhcp4
(wlp3s0): canceled DHCP transaction, DHCP client pid 1842
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.4117] dhcp4
(wlp3s0): state changed bound -> done
Jan 13 13:52:06 laptop kernel: wlp3s0: deauthenticating from <REDACTED MAC> by
local choice (Reason: 3=DEAUTH_LEAVING)
Jan 13 13:52:06 laptop avahi-daemon[974]: Withdrawing address record for
<REDACTED IP-ADDRESS> on wlp3s0.
Jan 13 13:52:06 laptop kernel: wlp3s0: failed to remove key (1,
ff:ff:ff:ff:ff:ff) from hardware (-22)
Jan 13 13:52:06 laptop avahi-daemon[974]: Leaving mDNS multicast group on
interface wlp3s0.IPv4 with address <REDACTED IP-ADDRESS>.
Jan 13 13:52:06 laptop avahi-daemon[974]: Interface wlp3s0.IPv4 no longer
relevant for mDNS.
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.4382] device
(wlp3s0): set-hw-addr: set MAC address to <REDACTED MAC> (scanning)
Jan 13 13:52:06 laptop kernel: IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not
ready
Jan 13 13:52:06 laptop nscd[967]: 967 monitored file `/etc/resolv.conf` was
written to
Jan 13 13:52:06 laptop NetworkManager[1162]: nisdomainname: you must be root to
change the domain name
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.5938] manager:
NetworkManager state is now DISCONNECTED
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.5941] policy:
set-hostname: set hostname to 'localhost.localdomain' (no default device)
Jan 13 13:52:06 laptop dbus-daemon[989]: [system] Activating via systemd:
service name='org.freedesktop.hostname1'
unit='dbus-org.freedesktop.hostname1.service' requested by ':1.6' (uid=0
pid=1162 comm="/usr/sbin/NetworkManager --no-daemon ")
Jan 13 13:52:06 laptop nm-dispatcher[6137]: req:2 'down' [wlp3s0]: new request
(4 scripts)
Jan 13 13:52:06 laptop nm-dispatcher[6137]: req:2 'down' [wlp3s0]: start
running ordered scripts...
Jan 13 13:52:06 laptop systemd[1]: Starting Hostname Service...
Jan 13 13:52:06 laptop NetworkManager[1162]: <warn>  [1515847926.6091]
sup-iface[0x<REDACTED>,wlp3s0]: connection disconnected (reason -3)
Jan 13 13:52:06 laptop NetworkManager[1162]: <info>  [1515847926.6092] device
(wlp3s0): supplicant interface state: completed -> disconnected
Jan 13 13:52:06 laptop dbus-daemon[989]: [system] Successfully activated
service 'org.freedesktop.hostname1'
Jan 13 13:52:06 laptop systemd[1]: Started Hostname Service.
Jan 13 13:52:06 localhost.localdomain systemd-hostnamed[6277]: Changed host
name to 'localhost.localdomain'
Jan 13 13:52:06 localhost.localdomain nm-dispatcher[6137]: req:3 'hostname':
new request (4 scripts)
Jan 13 13:52:06 localhost.localdomain nm-dispatcher[6137]: ping:
/dev/disk/by-path/pci-0000: Name or service not known
Jan 13 13:52:06 localhost.localdomain nm-dispatcher[6137]: ping:
/dev/disk/by-path/pci-0000: Name or service not known
Jan 13 13:52:06 localhost.localdomain systemd[2044]: Failed to parse
/proc/self/mountinfo: No such file or directory
-- Reboot --
Jan 13 13:52:43 localhost kernel: microcode: microcode updated early to
revision 0x20, date = 2017-01-27
Jan 13 13:52:43 localhost kernel: Linux version 4.14.12-1-default
(geeko@buildhost) (gcc version 7.2.1 20171020 [gcc-7-branch revision 253932]
(SUSE Linux)) #1 SMP PREEMPT Fri Jan 5 18:15:55 UTC 2018 (3cf399e)

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