But this means that you are using wicked, which also does not work in my case. So it seems, my update broke something else.
When I look at the log (note that today it is a bit different internet connection):
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3698] device[0x55e5cb87d690] (wlp2s0): queued IP4 config change
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3699] platform-linux: event-notification: RTM_NEWROUTE, flags excl,create, seq 0: ignore
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3699] platform-linux: event-notification: RTM_NEWROUTE, flags excl,create, seq 0: ignore
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3699] platform-linux: event-notification: RTM_NEWROUTE, flags excl,create, seq 0: ignore
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3699] platform-linux: do-add-ip4-address[2: 192.168.0.6/24]: success
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3699] platform: route: append IPv4 route: 192.168.0.0/24 via 0.0.0.0 dev 2 metric 600 mss 0 rt-src rt-kernel scope link pref-src 192.168.0.6
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3700] platform-linux: event-notification: RTM_NEWROUTE, flags excl,create, seq 45: 192.168.0.0/24 via 0.0.0.0 dev 2 metric 600 mss 0 rt-src rt-kernel scope link pref-src 192.168.0.6
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3700] platform: signal: route 4 added: 192.168.0.0/24 via 0.0.0.0 dev 2 metric 600 mss 0 rt-src rt-kernel scope link pref-src 192.168.0.6
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3700] platform-linux: do-add-ip4-route[192.168.0.0/24 via 0.0.0.0 dev 2 metric 600 mss 0 rt-src rt-kernel scope link pref-src 192.168.0.6]: success
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3700] platform: route: append IPv4 route: 0.0.0.0/0 via 192.168.0.1 dev 2 metric 20600 mss 0 rt-src dhcp
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3701] platform-linux: event-notification: RTM_NEWROUTE, flags excl,create, seq 46: 0.0.0.0/0 via 192.168.0.1 dev 2 metric 20600 mss 0 rt-src rt-dhcp scope global
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3701] platform: signal: route 4 added: 0.0.0.0/0 via 192.168.0.1 dev 2 metric 20600 mss 0 rt-src rt-dhcp scope global
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3701] platform-linux: do-add-ip4-route[0.0.0.0/0 via 192.168.0.1 dev 2 metric 20600 mss 0 rt-src rt-dhcp scope global]: success
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3702] platform: ip4-dev-route: register 192.168.0.0/24 via 0.0.0.0 dev 2 metric 0 mss 0 rt-src rt-kernel scope link pref-src 192.168.0.6
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3702] dbus-object[0x55e5cb7823c0]: export: "/org/freedesktop/NetworkManager/IP4Config/4"
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3705] device[0x55e5cb87d690] (wlp2s0): ip4-config: set IP Config instance (/org/freedesktop/NetworkManager/IP4Config/4)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3705] platform-linux: sysctl: reading '/proc/sys/net/ipv4/conf/wlp2s0/rp_filter': '0'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3706] platform-linux: sysctl: reading '/proc/sys/net/ipv4/conf/all/rp_filter': '1'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3706] platform-linux: sysctl: setting '/proc/sys/net/ipv4/conf/wlp2s0/rp_filter' to '2' (current value is '0')
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3708] dns-mgr: (device_ip_config_changed): queueing DNS updates (1)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3708] dns-mgr: (device_ip_config_changed): DNS configuration did not change
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3712] dns-mgr: (device_ip_config_changed): no DNS changes to commit (0)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3712] device[0x55e5cb87d690] (wlp2s0): remove_pending_action (1): 'dhcp4'
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3712] device[0x55e5cb87d690] (wlp2s0): ip4-state: set to 3 (done)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3713] active-connection[0x55e5cb7820d0]: set state-flags layer2-ready,ip4-ready (was layer2-ready)
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.3714] device (wlp2s0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3717] dispatcher: (3) (wlp2s0) dispatching action 'pre-up' (with callback)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3718] dispatcher: (3) simulate request; no scripts in /etc/NetworkManager/dispatcher.d/pre-up.d
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3723] device[0x55e5cb87d690] (wlp2s0): activation-stage: complete activate_stage5_ip4_config_result,v4 (id 3946)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3724] device[0x55e5cb87d690] (wlp2s0): ip4-config: update (commit=0, new-config=0x55e5cb7829b0)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3724] platform-linux: sysctl: reading '/proc/sys/net/ipv4/conf/wlp2s0/rp_filter': '2' (changed from '0' on last read)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3725] device[0x55e5cb87d690] (wlp2s0): add_pending_action (2): 'queued-state-change-secondaries'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3725] device[0x55e5cb87d690] (wlp2s0): queue-state[secondaries, reason:none, id:3951]: queue state change
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3726] device[0x55e5cb87d690] (wlp2s0): queue-state[secondaries, reason:none, id:3951]: change state
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.3726] device (wlp2s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3728] device[0x55e5cb87d690] (wlp2s0): add_pending_action (3): 'queued-state-change-activated'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3728] device[0x55e5cb87d690] (wlp2s0): queue-state[activated, reason:none, id:3952]: queue state change
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3729] device[0x55e5cb87d690] (wlp2s0): device entered SECONDARIES state
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3729] device[0x55e5cb87d690] (wlp2s0): remove_pending_action (2): 'queued-state-change-secondaries'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3729] device[0x55e5cb87d690] (wlp2s0): queue-state[activated, reason:none, id:3952]: change state
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.3729] device (wlp2s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3734] config: device-state: write #2 (/run/NetworkManager/devices/2); managed=managed, connection-uuid=c162e5d8-9f8f-4e39-ad6a-c0f44e71256f, route-metric-default=600-600
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3734] active-connection[0x55e5cb7820d0]: set state activated (was activating)
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.3736] manager: NetworkManager state is now CONNECTED_LOCAL
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3737] active-connection[0x55e5cb7820d0]: check-master-ready: not signalling (state activated, no master)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3741] device[0x55e5cb87d690] (wlp2s0): remove_pending_action (1): 'activation-0x55e5cb7820d0'
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3794] settings-connection[0x55e5cb780b90,c162e5d8-9f8f-4e39-ad6a-c0f44e71256f]: autoconnect: retries set 4 (reset)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3801] dns-mgr: (device_state_changed): queueing DNS updates (1)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3803] dns-mgr: (update_routing_and_dns): queueing DNS updates (2)
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.3805] manager: NetworkManager state is now CONNECTED_SITE
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.3811] policy: set 'homenetwork' (wlp2s0) as default for IPv4 routing and DNS
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3811] manager: PrimaryConnection now homenetwork
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3813] policy: set-hostname: updating hostname (routing and dns)
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3813] hostname: transient hostname retrieval failed
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3813] policy: get-hostname: "linux"
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3813] hostname: transient hostname retrieval failed
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3814] policy: get-hostname: "linux"
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3814] policy: set-hostname: hostname already set to 'linux' (from system configuration)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3814] dns-mgr: (update_routing_and_dns): DNS configuration changed
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3814] dns-mgr: (update_routing_and_dns): no DNS changes to commit (1)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3814] dns-mgr: (device_state_changed): DNS configuration changed
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3814] dns-mgr: (device_state_changed): committing DNS changes (0)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3814] dns-mgr: update-dns: updating resolv.conf
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3814] dns-mgr: config: 100 best v4 2 : 192.168.0.1
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3815] dns-mgr: spawning '/sbin/netconfig modify --service NetworkManager'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3849] dns-mgr: writing to netconfig: INTERFACE='NetworkManager'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3849] dns-mgr: writing to netconfig: DNSSEARCH='localdomain'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3849] dns-mgr: writing to netconfig: DNSSERVERS='192.168.0.1'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.3850] kill child process 'netconfig' (4054): waiting for process to terminate after sending no signal (0)...
Feb 21 10:15:59 linux NetworkManager[1332]: nisdomainname: you must be root to change the domain name
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.6993] kill child process 'netconfig' (4054): after sending no signal (0), process 4054 exited normally with status 0 (314382 usec elapsed)
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.6995] dns-mgr: update-resolv-conf: write internal file /run/NetworkManager/resolv.conf succeeded
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.6997] dns-mgr: current configuration: {'nameservers': <'192.168.0.1']>, 'domains': <'localdomain']>, 'interface': <'wlp2s0'>, 'priority': <100>, 'vpn': <false>}]
Feb 21 10:15:59 linux NetworkManager[1332]: <info> [1550740559.6998] device (wlp2s0): Activation: successful, device activated.
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.6998] device[0x55e5cb87d690] (wlp2s0): set metered value 4
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7000] manager: new metered value: 4
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7001] dispatcher: (4) (wlp2s0) dispatching action 'up'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7008] create NMPacrunnerManager singleton (0x55e5cb8a6b00)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7009] pacrunner: call[0x7fab200a06c0]: send: new config ({'Interface': <'wlp2s0'>, 'Method': <'direct'>, 'BrowserOnly': <false>},)
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.7009] device[0x55e5cb87d690] (wlp2s0): connectivity: periodic-check: re-scheduled in 1000 milliseconds (1 seconds interval)
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.7009] device[0x55e5cb87d690] (wlp2s0): connectivity: start check (seq:13, periodic-check)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7009] connectivity: (wlp2s0) start request to 'http://conncheck.opensuse.org'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7009] device[0x55e5cb87d690] (wlp2s0): remove_pending_action (0): 'queued-state-change-activated'
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7010] bus-manager: (dhcp) closed connection 0x55e5cb76e7b0 on private socket
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7040] connectivity: (wlp2s0) check completed: LIMITED; check failed with curl status 6
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.7042] device[0x55e5cb87d690] (wlp2s0): connectivity: complete check (seq:13, state:LIMITED)
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.7043] device[0x55e5cb87d690] (wlp2s0): connectivity: periodic-check: re-scheduled in 1996 milliseconds (2 seconds interval)
Feb 21 10:15:59 linux NetworkManager[1332]: <debug> [1550740559.7341] pacrunner: name owner disappeared
the difference to a working machine comes in with
Feb 21 10:15:59 linux NetworkManager[1332]: <trace> [1550740559.3813] hostname: transient hostname retrieval failed
Does anyone know what that means?