thomas@thomas-linux:~$ tail -f /var/log/syslog 
May 28 23:43:45 thomas-linux NetworkManager[846]: <info> Activation (wlan2) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
May 28 23:43:45 thomas-linux NetworkManager[846]: <info> Activation (wlan2) Stage 4 of 5 (IPv6 Configure Timeout) started...
May 28 23:43:45 thomas-linux NetworkManager[846]: <info> Activation (wlan2) Stage 4 of 5 (IPv6 Configure Timeout) complete.
May 28 23:44:26 thomas-linux wpa_supplicant[1251]: wlan2: CTRL-EVENT-SCAN-STARTED 
May 28 23:46:40 thomas-linux avahi-daemon[835]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.178.5.
May 28 23:46:40 thomas-linux avahi-daemon[835]: New relevant interface eth0.IPv4 for mDNS.
May 28 23:46:40 thomas-linux avahi-daemon[835]: Registering new address record for 192.168.178.5 on eth0.IPv4.
May 28 23:46:41 thomas-linux ntpd[6947]: Listen normally on 7 eth0 192.168.178.5 UDP 123
May 28 23:46:41 thomas-linux ntpd[6947]: peers refreshed
May 28 23:46:41 thomas-linux ntpd[6947]: new interface(s) found: waking up resolver
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Auto-activating connection 'Kabelnetzwerkverbindung 1'.
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) starting connection 'Kabelnetzwerkverbindung 1'
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0]
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0]
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds)
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> dhclient started with pid 6991
May 28 23:47:58 thomas-linux avahi-daemon[835]: Withdrawing address record for fe80::216:17ff:fee5:7374 on eth0.
May 28 23:47:58 thomas-linux avahi-daemon[835]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::216:17ff:fee5:7374.
May 28 23:47:58 thomas-linux avahi-daemon[835]: Interface eth0.IPv6 no longer relevant for mDNS.
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
May 28 23:47:58 thomas-linux dhclient: Internet Systems Consortium DHCP Client 4.2.4
May 28 23:47:58 thomas-linux dhclient: Copyright 2004-2012 Internet Systems Consortium.
May 28 23:47:58 thomas-linux dhclient: All rights reserved.
May 28 23:47:58 thomas-linux dhclient: For info, please visit https://www.isc.org/software/dhcp/
May 28 23:47:58 thomas-linux dhclient: 
May 28 23:47:58 thomas-linux NetworkManager[846]: <info> (eth0): DHCPv4 state changed nbi -> preinit
May 28 23:47:58 thomas-linux dhclient: Listening on LPF/eth0/00:16:17:e5:73:74
May 28 23:47:58 thomas-linux dhclient: Sending on   LPF/eth0/00:16:17:e5:73:74
May 28 23:47:58 thomas-linux dhclient: Sending on   Socket/fallback
May 28 23:47:58 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x152e836c)
May 28 23:47:59 thomas-linux ntpd[6947]: Deleting interface #5 eth0, fe80::216:17ff:fee5:7374#123, interface stats: received=0, sent=0, dropped=0, active_time=258 secs
May 28 23:47:59 thomas-linux ntpd[6947]: peers refreshed
May 28 23:47:59 thomas-linux avahi-daemon[835]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::216:17ff:fee5:7374.
May 28 23:47:59 thomas-linux avahi-daemon[835]: New relevant interface eth0.IPv6 for mDNS.
May 28 23:47:59 thomas-linux avahi-daemon[835]: Registering new address record for fe80::216:17ff:fee5:7374 on eth0.*.
May 28 23:48:01 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0x152e836c)
May 28 23:48:01 thomas-linux ntpd[6947]: Listen normally on 8 eth0 fe80::216:17ff:fee5:7374 UDP 123
May 28 23:48:01 thomas-linux ntpd[6947]: peers refreshed
May 28 23:48:01 thomas-linux ntpd[6947]: new interface(s) found: waking up resolver
May 28 23:48:05 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0x152e836c)
May 28 23:48:14 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0x152e836c)
May 28 23:48:26 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0x152e836c)
May 28 23:48:38 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 14 (xid=0x152e836c)
May 28 23:48:43 thomas-linux NetworkManager[846]: <warn> (eth0): DHCPv4 request timed out.
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> (eth0): canceled DHCP transaction, DHCP client pid 6991
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 4 of 5 (IPv4 Configure Timeout) scheduled...
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 4 of 5 (IPv4 Configure Timeout) started...
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> (eth0): device state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
May 28 23:48:43 thomas-linux NetworkManager[846]: <warn> Activation (eth0) failed for connection 'Kabelnetzwerkverbindung 1'
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 4 of 5 (IPv4 Configure Timeout) complete.
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> (eth0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 28 23:48:43 thomas-linux NetworkManager[846]: <info> (eth0): deactivating device (reason 'none') [0]
May 28 23:48:43 thomas-linux avahi-daemon[835]: Withdrawing address record for fe80::216:17ff:fee5:7374 on eth0.
May 28 23:48:43 thomas-linux avahi-daemon[835]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::216:17ff:fee5:7374.
May 28 23:48:43 thomas-linux avahi-daemon[835]: Interface eth0.IPv6 no longer relevant for mDNS.
May 28 23:48:43 thomas-linux avahi-daemon[835]: Withdrawing address record for 192.168.178.5 on eth0.
May 28 23:48:43 thomas-linux avahi-daemon[835]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.178.5.
May 28 23:48:43 thomas-linux avahi-daemon[835]: Interface eth0.IPv4 no longer relevant for mDNS.
May 28 23:48:45 thomas-linux avahi-daemon[835]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::216:17ff:fee5:7374.
May 28 23:48:45 thomas-linux avahi-daemon[835]: New relevant interface eth0.IPv6 for mDNS.
May 28 23:48:45 thomas-linux avahi-daemon[835]: Registering new address record for fe80::216:17ff:fee5:7374 on eth0.*.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Auto-activating connection 'Kabelnetzwerkverbindung 1'.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) starting connection 'Kabelnetzwerkverbindung 1'
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0]
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0]
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds)
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> dhclient started with pid 6995
May 28 23:48:46 thomas-linux avahi-daemon[835]: Withdrawing address record for fe80::216:17ff:fee5:7374 on eth0.
May 28 23:48:46 thomas-linux avahi-daemon[835]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::216:17ff:fee5:7374.
May 28 23:48:46 thomas-linux avahi-daemon[835]: Interface eth0.IPv6 no longer relevant for mDNS.
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
May 28 23:48:46 thomas-linux dhclient: Internet Systems Consortium DHCP Client 4.2.4
May 28 23:48:46 thomas-linux dhclient: Copyright 2004-2012 Internet Systems Consortium.
May 28 23:48:46 thomas-linux dhclient: All rights reserved.
May 28 23:48:46 thomas-linux dhclient: For info, please visit https://www.isc.org/software/dhcp/
May 28 23:48:46 thomas-linux dhclient: 
May 28 23:48:46 thomas-linux NetworkManager[846]: <info> (eth0): DHCPv4 state changed nbi -> preinit
May 28 23:48:46 thomas-linux dhclient: Listening on LPF/eth0/00:16:17:e5:73:74
May 28 23:48:46 thomas-linux dhclient: Sending on   LPF/eth0/00:16:17:e5:73:74
May 28 23:48:46 thomas-linux dhclient: Sending on   Socket/fallback
May 28 23:48:46 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x668a0494)
May 28 23:48:47 thomas-linux avahi-daemon[835]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::216:17ff:fee5:7374.
May 28 23:48:47 thomas-linux avahi-daemon[835]: New relevant interface eth0.IPv6 for mDNS.
May 28 23:48:47 thomas-linux avahi-daemon[835]: Registering new address record for fe80::216:17ff:fee5:7374 on eth0.*.
May 28 23:48:49 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5 (xid=0x668a0494)
May 28 23:48:49 thomas-linux ntpd[6947]: Deleting interface #7 eth0, 192.168.178.5#123, interface stats: received=0, sent=0, dropped=0, active_time=128 secs
May 28 23:48:49 thomas-linux ntpd[6947]: peers refreshed
May 28 23:48:54 thomas-linux dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11 (xid=0x668a0494)