$ egrep -i 'net|eth|wlan|firm|reason' /var/log/syslog
Oct 8 11:54:23 KC NetworkManager[847]: <info> [1507456463.3913] manager: kernel firmware directory '/lib/firmware' changed
Oct 8 11:54:27 KC NetworkManager[847]: <info> [1507456467.5115] manager: kernel firmware directory '/lib/firmware' changed
Oct 8 11:55:10 KC kernel: [ 841.869145] audit: type=1400 audit(1507456510.335:18): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=12864 comm="apparmor_parser"
Oct 8 11:55:10 KC kernel: [ 841.870048] audit: type=1400 audit(1507456510.335:19): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-helper" pid=12864 comm="apparmor_parser"
Oct 8 11:55:23 KC dbus-send[16409]: method return time=1507456523.658657 sender=org.freedesktop.DBus -> destination=:1.66 serial=3 reply_serial=2
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.8521] dhcp4 (enp2s0): state changed bound -> expire
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.8764] dhcp4 (enp2s0): canceled DHCP transaction, DHCP client pid 971
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.8765] dhcp4 (enp2s0): state changed expire -> done
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.8769] device (enp2s0): state change: activated -> failed (reason 'ip-config-expired') [100 120 6]
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.8772] manager: NetworkManager state is now CONNECTED_LOCAL
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.8774] manager: NetworkManager state is now DISCONNECTED
Oct 8 12:08:08 KC NetworkManager[847]: <warn> [1507457288.9688] device (enp2s0): Activation: failed for connection 'Kabelnetzwerkverbindung 1'
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.9752] device (enp2s0): state change: failed -> disconnected (reason 'none') [120 30 0]
Oct 8 12:08:08 KC NetworkManager[847]: <info> [1507457288.9844] dns-mgr: Writing DNS information to /sbin/resolvconf
Oct 8 12:08:08 KC systemd[1]: Starting Network Manager Script Dispatcher Service...
Oct 8 12:08:09 KC NetworkManager[847]: <warn> [1507457289.0386] (pid 971) unhandled DHCP event for interface enp2s0
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0479] policy: auto-activating connection 'Kabelnetzwerkverbindung 1'
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0497] device (enp2s0): Activation: starting connection 'Kabelnetzwerkverbindung 1' (12507d66-1c4f-3033-abb6-d415055a0cf9)
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0500] device (enp2s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0503] manager: NetworkManager state is now CONNECTING
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0510] device (enp2s0): state change: prepare -> config (reason 'none') [40 50 0]
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0519] device (enp2s0): state change: config -> ip-config (reason 'none') [50 70 0]
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0525] dhcp4 (enp2s0): activation: beginning transaction (timeout in 45 seconds)
Oct 8 12:08:09 KC systemd[1]: Started Network Manager Script Dispatcher Service.
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.0943] dhcp4 (enp2s0): dhclient started with pid 31105
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2335] address 192.168.1.3
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2348] plen 24 (255.255.255.0)
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2363] gateway 192.168.1.1
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2374] server identifier 192.168.1.1
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2379] lease time 3600
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2383] hostname 'KC'
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2387] nameserver '192.168.1.1'
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2390] dhcp4 (enp2s0): state changed unknown -> bound
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2567] device (enp2s0): state change: ip-config -> ip-check (reason 'none') [70 80 0]
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2647] device (enp2s0): state change: ip-check -> secondaries (reason 'none') [80 90 0]
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2752] device (enp2s0): state change: secondaries -> activated (reason 'none') [90 100 0]
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.2772] manager: NetworkManager state is now CONNECTED_LOCAL
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.5055] manager: NetworkManager state is now CONNECTED_GLOBAL
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.5059] policy: set 'Kabelnetzwerkverbindung 1' (enp2s0) as default for IPv4 routing and DNS
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.5065] dns-mgr: Writing DNS information to /sbin/resolvconf
Oct 8 12:08:09 KC NetworkManager[847]: <info> [1507457289.5360] device (enp2s0): Activation: successful, device activated.
Oct 8 12:08:09 KC whoopsie[1096]: [12:08:09] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/1
Oct 8 12:08:09 KC whoopsie[1096]: [12:08:09] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/1
Oct 8 12:08:09 KC whoopsie[1096]: [12:08:09] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/1
Oct 8 12:08:15 KC NetworkManager[847]: <warn> [1507457295.9436] device (enp2s0): disconnecting connection 'Kabelnetzwerkverbindung 1' for new activation request.
Oct 8 12:08:15 KC NetworkManager[847]: <info> [1507457295.9437] device (enp2s0): state change: activated -> deactivating (reason 'new-activation') [100 110 60]
Oct 8 12:08:15 KC NetworkManager[847]: <info> [1507457295.9444] manager: NetworkManager state is now DISCONNECTING
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0021] device (enp2s0): disconnecting for new activation request.
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0049] audit: op="connection-activate" uuid="12507d66-1c4f-3033-abb6-d415055a0cf9" name="Kabelnetzwerkverbindung 1" pid=2173 uid=1000 result="success"
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0086] device (enp2s0): state change: deactivating -> disconnected (reason 'new-activation') [110 30 60]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0341] dhcp4 (enp2s0): canceled DHCP transaction, DHCP client pid 31105
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0342] dhcp4 (enp2s0): state changed bound -> done
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0406] dns-mgr: Writing DNS information to /sbin/resolvconf
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0682] manager: NetworkManager state is now DISCONNECTED
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0694] device (enp2s0): Activation: starting connection 'Kabelnetzwerkverbindung 1' (12507d66-1c4f-3033-abb6-d415055a0cf9)
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0897] device (enp2s0): state change: disconnected -> prepare (reason 'none') [30 40 0]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0906] manager: NetworkManager state is now CONNECTING
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0916] device (enp2s0): state change: prepare -> config (reason 'none') [40 50 0]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0925] device (enp2s0): state change: config -> ip-config (reason 'none') [50 70 0]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.0931] dhcp4 (enp2s0): activation: beginning transaction (timeout in 45 seconds)
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1112] dhcp4 (enp2s0): dhclient started with pid 31282
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1532] address 192.168.1.3
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1533] plen 24 (255.255.255.0)
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1534] gateway 192.168.1.1
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1534] server identifier 192.168.1.1
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1534] lease time 3600
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1535] hostname 'KC'
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1535] nameserver '192.168.1.1'
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1535] dhcp4 (enp2s0): state changed unknown -> bound
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1611] device (enp2s0): state change: ip-config -> ip-check (reason 'none') [70 80 0]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1699] device (enp2s0): state change: ip-check -> secondaries (reason 'none') [80 90 0]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1770] device (enp2s0): state change: secondaries -> activated (reason 'none') [90 100 0]
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.1788] manager: NetworkManager state is now CONNECTED_LOCAL
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.2796] manager: NetworkManager state is now CONNECTED_GLOBAL
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.2809] policy: set 'Kabelnetzwerkverbindung 1' (enp2s0) as default for IPv4 routing and DNS
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.2821] dns-mgr: Writing DNS information to /sbin/resolvconf
Oct 8 12:08:16 KC NetworkManager[847]: <info> [1507457296.3051] device (enp2s0): Activation: successful, device activated.
Oct 8 12:08:16 KC whoopsie[1096]: [12:08:16] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/2
Oct 8 12:08:16 KC whoopsie[1096]: [12:08:16] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/2
Oct 8 12:08:16 KC whoopsie[1096]: [12:08:16] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/2
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0149] address 192.168.1.3
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0150] plen 24 (255.255.255.0)
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0151] gateway 192.168.1.1
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0152] server identifier 192.168.1.1
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0152] lease time 3600
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0153] hostname 'KC'
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0153] nameserver '192.168.1.1'
Oct 8 12:38:16 KC NetworkManager[847]: <info> [1507459096.0154] dhcp4 (enp2s0): state changed bound -> bound
Oct 8 12:38:16 KC systemd[1]: Starting Network Manager Script Dispatcher Service...
Oct 8 12:38:16 KC systemd[1]: Started Network Manager Script Dispatcher Service.
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8134] address 192.168.1.3
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8144] plen 24 (255.255.255.0)
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8145] gateway 192.168.1.1
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8145] server identifier 192.168.1.1
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8145] lease time 3600
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8146] hostname 'KC'
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8146] nameserver '192.168.1.1'
Oct 8 13:05:52 KC NetworkManager[847]: <info> [1507460752.8146] dhcp4 (enp2s0): state changed bound -> bound
Oct 8 13:05:52 KC systemd[1]: Starting Network Manager Script Dispatcher Service...
Oct 8 13:05:52 KC systemd[1]: Started Network Manager Script Dispatcher Service.