Additional observation:

Somehow upgrading the kernel did not happen. So the kernel stayed 3.19.0.15 for a while.

Other upgrades went fine. So for the last few days, I did not observe the phenomenon on this particular machine.
(Others, where the kernel war upgraded to 3.19.0.20 had the issue constantly)

After upgrading to 3.19.0.20 on this machine, the behaviour / issue reappeared.

here is the syslog. Mind 09:53:21 where NetworkManager deactivates for no reason.

...
Jun  4 09:53:05 mbr kernel: [13615.956552] bridge-wlan0: down
Jun  4 09:53:05 mbr kernel: [13615.956559] bridge-wlan0: detached
Jun  4 09:53:05 mbr kernel: [13615.956633] done.
Jun  4 09:53:05 mbr kernel: [13615.956642] video LNXVIDEO:00: Restoring backlight state
Jun  4 09:53:05 mbr kernel: [13615.958066] cfg80211: World regulatory domain updated:
Jun  4 09:53:05 mbr kernel: [13615.958069] cfg80211:  DFS Master region: unset
Jun  4 09:53:05 mbr kernel: [13615.958070] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Jun  4 09:53:05 mbr kernel: [13615.958072] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun  4 09:53:05 mbr kernel: [13615.958074] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun  4 09:53:05 mbr kernel: [13615.958075] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun  4 09:53:05 mbr kernel: [13615.958077] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun  4 09:53:05 mbr kernel: [13615.958078] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun  4 09:53:05 mbr NetworkManager[922]: <info> wake requested (sleeping: yes  enabled: yes)
Jun  4 09:53:05 mbr NetworkManager[922]: <info> waking up...
Jun  4 09:53:05 mbr NetworkManager[922]: <info> (wlan0): device state change: activated -> unmanaged (reason 'sleeping') [100 10 37]
Jun  4 09:53:05 mbr NetworkManager[922]: <info> (wlan0): deactivating device (reason 'sleeping') [37]
Jun  4 09:53:05 mbr systemd[1]: Started Run anacron jobs.
Jun  4 09:53:05 mbr systemd[1]: Starting Run anacron jobs...
Jun  4 09:53:05 mbr anacron[5425]: Anacron 2.3 started on 2015-06-04
Jun  4 09:53:05 mbr anacron[5425]: Will run job `cron.daily' in 5 min.
Jun  4 09:53:05 mbr anacron[5425]: Jobs will be executed sequentially
Jun  4 09:53:06 mbr wpa_supplicant[1134]: wlan0: CTRL-EVENT-SCAN-STARTED
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 4639
Jun  4 09:53:06 mbr avahi-daemon[945]: Withdrawing address record for fe80::1610:9fff:fed2:25f7 on wlan0.
Jun  4 09:53:06 mbr avahi-daemon[945]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::1610:9fff:fed2:25f7.
Jun  4 09:53:06 mbr avahi-daemon[945]: Interface wlan0.IPv6 no longer relevant for mDNS.
Jun  4 09:53:06 mbr vmnet-natd: RTM_DELADDR: index:2, addr:10.1.0.103
Jun  4 09:53:06 mbr avahi-daemon[945]: Withdrawing address record for 10.1.0.103 on wlan0.
Jun  4 09:53:06 mbr avahi-daemon[945]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 10.1.0.103.
Jun  4 09:53:06 mbr avahi-daemon[945]: Interface wlan0.IPv4 no longer relevant for mDNS.
Jun  4 09:53:06 mbr NetworkManager[922]: <info> Writing DNS information to /sbin/resolvconf
Jun  4 09:53:06 mbr dnsmasq[1359]: setting upstream servers from DBus
Jun  4 09:53:06 mbr gnome-session[2464]: (deja-dup-monitor:3120): GLib-CRITICAL **: Source ID 198 was not found when attempting to remove it
Jun  4 09:53:06 mbr whoopsie[909]: [09:53:06] Cannot reach: https://daisy.ubuntu.com
Jun  4 09:53:06 mbr NetworkManager[922]: <info> NetworkManager state is now CONNECTED_LOCAL
Jun  4 09:53:06 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00001002
Jun  4 09:53:06 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00001002
Jun  4 09:53:06 mbr NetworkManager[922]: <info> NetworkManager state is now DISCONNECTED
Jun  4 09:53:06 mbr kernel: [13616.082194] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Jun  4 09:53:06 mbr kernel: [13616.156323] userif-3: sent link down event.
Jun  4 09:53:06 mbr kernel: [13616.156325] userif-3: sent link up event.
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (wlan0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Jun  4 09:53:06 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:06 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (wlan0): preparing device
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (EC:88:92:61:E9:5F): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Jun  4 09:53:06 mbr dbus[991]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Jun  4 09:53:06 mbr systemd[1]: Starting Network Manager Script Dispatcher Service...
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (EC:88:92:61:E9:5F): preparing device
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (EC:88:92:61:E9:5F): device state change: unavailable -> disconnected (reason 'none') [20 30 0]
Jun  4 09:53:06 mbr dbus[991]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun  4 09:53:06 mbr systemd[1]: Started Network Manager Script Dispatcher Service.
Jun  4 09:53:06 mbr nm-dispatcher: Dispatching action 'down' for wlan0
Jun  4 09:53:06 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:06 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:06 mbr vmnetBridge: Adding interface wlan0 index:2
Jun  4 09:53:06 mbr vmnetBridge: Started bridge wlan0 to virtual network 0.
Jun  4 09:53:06 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:06 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:06 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:06 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:06 mbr vmnetBridge: Removing interface wlan0 index:2
Jun  4 09:53:06 mbr kernel: [13616.512502] /dev/vmnet: open called by PID 1680 (vmnet-bridge)
Jun  4 09:53:06 mbr kernel: [13616.512510] /dev/vmnet: hub 0 does not exist, allocating memory.
Jun  4 09:53:06 mbr kernel: [13616.512529] /dev/vmnet: port on hub 0 successfully opened
Jun  4 09:53:06 mbr kernel: [13616.512536] bridge-wlan0: device is wireless, enabling SMAC
Jun  4 09:53:06 mbr kernel: [13616.512537] bridge-wlan0: up
Jun  4 09:53:06 mbr kernel: [13616.512540] bridge-wlan0: attached
Jun  4 09:53:06 mbr kernel: [13616.512829] bridge-wlan0: disabling the bridge
Jun  4 09:53:06 mbr vmnetBridge: Stopped bridge wlan0 to virtual network 0.
Jun  4 09:53:06 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:06 mbr wpa_supplicant[1134]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none
Jun  4 09:53:06 mbr wpa_supplicant[1134]: dbus: Failed to construct signal
Jun  4 09:53:06 mbr NetworkManager[922]: <warn> could not get interface properties: No readable properties in this interface.
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (wlan0): supplicant interface state: starting -> ready
Jun  4 09:53:06 mbr NetworkManager[922]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
Jun  4 09:53:06 mbr NetworkManager[922]: <warn> could not get interface properties: No readable properties in this interface.
Jun  4 09:53:06 mbr kernel: [13616.528448] bridge-wlan0: down
Jun  4 09:53:06 mbr kernel: [13616.528453] bridge-wlan0: detached
Jun  4 09:53:06 mbr kernel: [13616.531402] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
Jun  4 09:53:06 mbr kernel: [13616.712422] userif-3: sent link down event.
Jun  4 09:53:06 mbr kernel: [13616.712428] userif-3: sent link up event.
...
Jun  4 09:53:06 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:21 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00001002
Jun  4 09:53:21 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00001002
Jun  4 09:53:21 mbr wpa_supplicant[1134]: rfkill: WLAN soft blocked
Jun  4 09:53:21 mbr NetworkManager[922]: <info> WiFi hardware radio set disabled
Jun  4 09:53:21 mbr NetworkManager[922]: <info> (wlan0): device state change: disconnected -> unavailable (reason 'none') [30 20 0]
Jun  4 09:53:21 mbr NetworkManager[922]: <info> (wlan0): deactivating device (reason 'none') [0]
Jun  4 09:53:21 mbr NetworkManager[922]: <info> WiFi now disabled by radio killswitch
Jun  4 09:53:23 mbr NetworkManager[922]: <info> WiFi hardware radio set enabled
Jun  4 09:53:23 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:23 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:23 mbr vmnetBridge: Adding interface wlan0 index:2
Jun  4 09:53:23 mbr vmnetBridge: Started bridge wlan0 to virtual network 0.
Jun  4 09:53:23 mbr NetworkManager[922]: <info> WiFi now enabled by radio killswitch
Jun  4 09:53:23 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:23 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:23 mbr vmnetBridge: Removing interface wlan0 index:2
Jun  4 09:53:23 mbr kernel: [13633.183856] /dev/vmnet: open called by PID 1680 (vmnet-bridge)
Jun  4 09:53:23 mbr kernel: [13633.183879] /dev/vmnet: hub 0 does not exist, allocating memory.
Jun  4 09:53:23 mbr kernel: [13633.183939] /dev/vmnet: port on hub 0 successfully opened
Jun  4 09:53:23 mbr kernel: [13633.183967] bridge-wlan0: device is wireless, enabling SMAC
Jun  4 09:53:23 mbr kernel: [13633.183975] bridge-wlan0: up
Jun  4 09:53:23 mbr kernel: [13633.183982] bridge-wlan0: attached
Jun  4 09:53:23 mbr kernel: [13633.185576] bridge-wlan0: disabling the bridge
Jun  4 09:53:23 mbr vmnetBridge: Stopped bridge wlan0 to virtual network 0.
Jun  4 09:53:23 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:21 mbr wpa_supplicant[1134]: rfkill: WLAN soft blocked
Jun  4 09:53:23 mbr wpa_supplicant[1134]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none
Jun  4 09:53:23 mbr wpa_supplicant[1134]: dbus: Failed to construct signal
Jun  4 09:53:23 mbr kernel: [13633.207381] bridge-wlan0: down
Jun  4 09:53:23 mbr kernel: [13633.207391] bridge-wlan0: detached
Jun  4 09:53:23 mbr NetworkManager[922]: <warn> could not get interface properties: No readable properties in this interface.
Jun  4 09:53:23 mbr NetworkManager[922]: <info> (wlan0): supplicant interface state: starting -> ready
Jun  4 09:53:23 mbr NetworkManager[922]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
Jun  4 09:53:23 mbr NetworkManager[922]: <warn> could not get interface properties: No readable properties in this interface.
Jun  4 09:53:23 mbr wpa_supplicant[1134]: wlan0: CTRL-EVENT-SCAN-STARTED
Jun  4 09:53:23 mbr kernel: [13633.383709] userif-3: sent link down event.
Jun  4 09:53:23 mbr kernel: [13633.383716] userif-3: sent link up event.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Auto-activating connection 'rsb_hs'.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) starting connection 'rsb_hs'
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jun  4 09:53:26 mbr NetworkManager[922]: <info> NetworkManager state is now CONNECTING
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0/wireless): access point 'rsb_hs' has security, but secrets are required.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0/wireless): connection 'rsb_hs' has security, and secrets exist.  No new secrets needed.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Config: added 'ssid' value 'rsb_hs'
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Config: added 'scan_ssid' value '1'
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Config: added 'key_mgmt' value 'WPA-PSK'
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Config: added 'psk' value '<omitted>'
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): supplicant interface state: ready -> inactive
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Config: set interface ap_scan to 1
Jun  4 09:53:26 mbr wpa_supplicant[1134]: wlan0: Trying to associate with 64:66:b3:7e:84:b2 (SSID='rsb_hs' freq=5220 MHz)
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): supplicant interface state: inactive -> associating
Jun  4 09:53:26 mbr wpa_supplicant[1134]: wlan0: Associated with 64:66:b3:7e:84:b2
Jun  4 09:53:26 mbr kernel: [13636.592502] cfg80211: Calling CRDA for country: AT
Jun  4 09:53:26 mbr wpa_supplicant[1134]: wlan0: WPA: Key negotiation completed with 64:66:b3:7e:84:b2 [PTK=CCMP GTK=CCMP]
Jun  4 09:53:26 mbr wpa_supplicant[1134]: wlan0: CTRL-EVENT-CONNECTED - Connection to 64:66:b3:7e:84:b2 completed [id=0 id_str=]
Jun  4 09:53:26 mbr vmnetBridge: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:26 mbr vmnetBridge: Adding interface wlan0 index:2
Jun  4 09:53:23 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011003
Jun  4 09:53:26 mbr vmnet-natd: RTM_NEWLINK: name:wlan0 index:2 flags:0x00011043
Jun  4 09:53:26 mbr vmnetBridge: Started bridge wlan0 to virtual network 0.
Jun  4 09:53:26 mbr kernel: [13636.596101] cfg80211: Regulatory domain changed to country: AT
Jun  4 09:53:26 mbr kernel: [13636.596106] cfg80211:  DFS Master region: ETSI
Jun  4 09:53:26 mbr kernel: [13636.596108] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Jun  4 09:53:26 mbr kernel: [13636.596112] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jun  4 09:53:26 mbr kernel: [13636.596115] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jun  4 09:53:26 mbr kernel: [13636.596117] cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
Jun  4 09:53:26 mbr kernel: [13636.596120] cfg80211:   (5490000 KHz - 5710000 KHz @ 40000 KHz), (N/A, 2700 mBm), (0 s)
Jun  4 09:53:26 mbr kernel: [13636.596122] cfg80211:   (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
Jun  4 09:53:26 mbr kernel: [13636.596714] /dev/vmnet: open called by PID 1680 (vmnet-bridge)
Jun  4 09:53:26 mbr kernel: [13636.596727] /dev/vmnet: hub 0 does not exist, allocating memory.
Jun  4 09:53:26 mbr kernel: [13636.596756] /dev/vmnet: port on hub 0 successfully opened
Jun  4 09:53:26 mbr kernel: [13636.596769] bridge-wlan0: device is wireless, enabling SMAC
Jun  4 09:53:26 mbr kernel: [13636.596772] bridge-wlan0: up
Jun  4 09:53:26 mbr kernel: [13636.596777] bridge-wlan0: attached
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): supplicant interface state: associating -> completed
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'rsb_hs'.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) started...
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): device state change: config -> ip-config (reason 'none') [50 70 0]
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Beginning DHCPv4 transaction (timeout in 45 seconds)
Jun  4 09:53:26 mbr NetworkManager[922]: <info> dhclient started with pid 5508
Jun  4 09:53:26 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete.
Jun  4 09:53:26 mbr NetworkManager[922]: <info> (wlan0): DHCPv4 state changed nbi -> preinit
Jun  4 09:53:26 mbr dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3 (xid=0xd65f509)
Jun  4 09:53:26 mbr kernel: [13636.796910] userif-3: sent link down event.
Jun  4 09:53:26 mbr kernel: [13636.796915] userif-3: sent link up event.
Jun  4 09:53:27 mbr dhclient: DHCPREQUEST of 10.1.0.103 on wlan0 to 255.255.255.255 port 67 (xid=0xd65f509)
Jun  4 09:53:27 mbr dhclient: DHCPOFFER of 10.1.0.103 from 10.1.0.4
Jun  4 09:53:27 mbr dhclient: DHCPACK of 10.1.0.103 from 10.1.0.4
Jun  4 09:53:27 mbr NetworkManager[922]: <info> (wlan0): DHCPv4 state changed preinit -> bound
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   address 10.1.0.103
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   plen 8 (255.0.0.0)
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   gateway 10.1.0.254
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   server identifier 10.1.0.4
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   lease time 28800
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   nameserver '10.1.0.4'
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   nameserver '195.202.128.3'
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   domain name 'rsb.intern'
Jun  4 09:53:27 mbr NetworkManager[922]: <info>   domain search 'rsb.at.'
Jun  4 09:53:27 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Jun  4 09:53:27 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) started...
Jun  4 09:53:27 mbr vmnet-natd: RTM_NEWADDR: index:2, addr:10.1.0.103
Jun  4 09:53:27 mbr avahi-daemon[945]: Joining mDNS multicast group on interface wlan0.IPv4 with address 10.1.0.103.
Jun  4 09:53:27 mbr avahi-daemon[945]: New relevant interface wlan0.IPv4 for mDNS.
Jun  4 09:53:27 mbr avahi-daemon[945]: Registering new address record for 10.1.0.103 on wlan0.IPv4.
Jun  4 09:53:27 mbr NetworkManager[922]: <info> (wlan0): device state change: ip-config -> ip-check (reason 'none') [70 80 0]
Jun  4 09:53:27 mbr NetworkManager[922]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) complete.
Jun  4 09:53:27 mbr NetworkManager[922]: <info> (wlan0): device state change: ip-check -> secondaries (reason 'none') [80 90 0]
Jun  4 09:53:27 mbr NetworkManager[922]: <info> (wlan0): device state change: secondaries -> activated (reason 'none') [90 100 0]
Jun  4 09:53:27 mbr NetworkManager[922]: <info> NetworkManager state is now CONNECTED_LOCAL
Jun  4 09:53:27 mbr dhclient: bound to 10.1.0.103 -- renewal in 12328 seconds.
Jun  4 09:53:27 mbr kernel: [13637.984038] userif-3: sent link down event.
Jun  4 09:53:27 mbr kernel: [13637.984045] userif-3: sent link up event.
Jun  4 09:53:28 mbr vmnet-natd: RTM_NEWROUTE: index:2
Jun  4 09:53:28 mbr vmnetBridge: RTM_NEWROUTE: index:2
Jun  4 09:53:28 mbr NetworkManager[922]: <info> NetworkManager state is now CONNECTED_GLOBAL
Jun  4 09:53:28 mbr NetworkManager[922]: <info> Policy set 'rsb_hs' (wlan0) as default for IPv4 routing and DNS.
Jun  4 09:53:06 mbr whoopsie[909]: [09:53:06] Cannot reach: https://daisy.ubuntu.com
Jun  4 09:53:28 mbr whoopsie[909]: [09:53:28] Cannot reach: https://daisy.ubuntu.com
Jun  4 09:53:28 mbr NetworkManager[922]: <info> Writing DNS information to /sbin/resolvconf
Jun  4 09:53:28 mbr dnsmasq[1359]: setting upstream servers from DBus
Jun  4 09:53:28 mbr dnsmasq[1359]: using nameserver 10.1.0.4#53
Jun  4 09:53:28 mbr dnsmasq[1359]: using nameserver 195.202.128.3#53
Jun  4 09:53:28 mbr avahi-daemon[945]: Joining mDNS multicast group on interface wlan0.IPv6 with address fe80::1610:9fff:fed2:25f7.
Jun  4 09:53:28 mbr avahi-daemon[945]: New relevant interface wlan0.IPv6 for mDNS.
Jun  4 09:53:28 mbr avahi-daemon[945]: Registering new address record for fe80::1610:9fff:fed2:25f7 on wlan0.*.
Jun  4 09:53:28 mbr NetworkManager[922]: <info> Activation (wlan0) successful, device activated.
Jun  4 09:53:28 mbr dbus[991]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Jun  4 09:53:28 mbr systemd[1]: Starting Network Manager Script Dispatcher Service...
Jun  4 09:53:28 mbr whoopsie[909]: [09:53:28] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/6
Jun  4 09:53:28 mbr dbus[991]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun  4 09:53:28 mbr systemd[1]: Started Network Manager Script Dispatcher Service.
Jun  4 09:53:28 mbr nm-dispatcher: Dispatching action 'up' for wlan0
Jun  4 09:53:28 mbr whoopsie[909]: [09:53:28] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/6
Jun  4 09:53:28 mbr whoopsie[909]: [09:53:28] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/6
Jun  4 09:53:28 mbr whoopsie[909]: [09:53:28] online
...