Public bug reported:
Summary
=======
When setting up Wireless network via netplan config on a Raspberry Pi 4
4GB with Ubuntu Server 20.04 (image focal-preinstalled-server-
arm64+raspi.img.xz 2020-04-22 19:39 667M), the settings are not taken
into account until the device is rebooted, because the service created
(netplan-wpa-wlan0.service) is in a "inactive (dead)" state.
A workaround is to manually restart the service after applying netplan
configuration
$ sudo netplan apply
$ sudo systemctl restart netplan-wpa-wlan0.service
This should be done automatically when a new netplan configuration is
applied.
Steps to reproduce
==================
1. Install Ubuntu Server 20.04 image
(focal-preinstalled-server-arm64+raspi.img.xz) on a Raspberry Pi 4 4GB (I
haven't tested with Ubuntu Server on other devices).
2. Connect a screen and a USB keyboard, or connect to the device via serial
console (UART).
3. By default, the device is not connected to the network yet:
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group
default qlen 1000
link/ether dc:a6:32:57:b9:ba brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
qlen 1000
link/ether dc:a6:32:57:b9:bb brd ff:ff:ff:ff:ff:ff
$ networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 eth0 ether no-carrier configuring
3 wlan0 wlan off unmanaged
3 links listed.
4. Create a netplan config file to match your WiFi router config and
copy it to /etc/netplan/:
$ cat lab.yaml
network:
version: 2
wifis:
wlan0:
access-points:
ubuntu-cert-wpa:
password: myp455w0rd
dhcp4: yes
$ sudo cp lab.yaml /etc/netplan/
5. Apply the new configuration:
$ sudo netplan apply
In journalctl:
Apr 23 03:57:38 ubuntu systemd[1]: systemd-networkd-wait-online.service:
Succeeded.
Apr 23 03:57:38 ubuntu systemd[1]: Stopped Wait for Network to be Configured.
Apr 23 03:57:38 ubuntu systemd[1]: Stopping Network Service...
Apr 23 03:57:38 ubuntu systemd[1]: systemd-networkd.service: Succeeded.
Apr 23 03:57:38 ubuntu systemd[1]: Stopped Network Service.
Apr 23 03:57:39 ubuntu systemd[1]: Starting Network Service...
Apr 23 03:57:39 ubuntu sudo[1674]: pam_unix(sudo:session): session closed for
user root
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: Enumeration completed
Apr 23 03:57:39 ubuntu systemd[1]: Star[ 223.067294] brcmfmac:
brcmf_cfg80211_set_power_mgmt: power save enabled
ted Network Service.
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: wlan0: IPv6 successfully enabled
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: eth0: IPv6 successfully enabled
Apr 23 03:57:39 ubuntu kernel: brcmfmac: brcmf_cfg80211_set_power_mgmt: power
save enabled
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: wlan0: Link UP
$ networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 eth0 ether no-carrier configuring
3 wlan0 wlan no-carrier configuring
3 links listed.
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group
default qlen 1000
link/ether dc:a6:32:57:b9:ba brd ff:ff:ff:ff:ff:ff
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state
DOWN group default qlen 1000
link/ether dc:a6:32:57:b9:bb brd ff:ff:ff:ff:ff:ff
Even if I wait 5 minutes, nothing moves. networkctl tells me wlan0 is
"configuring", but nothing happens in the journal.
Trying to restart systemd-networkd doesn't help:
$ sudo systemctl status systemd-networkd
● systemd-networkd.service - Network Service
Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; ven>
Active: active (running) since Thu 2020-04-23 03:57:39 UTC; 1min 18s ago
TriggeredBy: ● systemd-networkd.socket
Docs: man:systemd-networkd.service(8)
Main PID: 1687 (systemd-network)
Status: "Processing requests..."
Tasks: 1 (limit: 4434)
CGroup: /system.slice/systemd-networkd.service
└─1687 /lib/systemd/systemd-networkd
Apr 23 03:57:39 ubuntu systemd[1]: Starting Network Service...
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: Enumeration completed
Apr 23 03:57:39 ubuntu systemd[1]: Started Network Service.
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: wlan0: IPv6 successfully enabled
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: eth0: IPv6 successfully enabled
Apr 23 03:57:39 ubuntu systemd-networkd[1687]: wlan0: Link UP
$ sudo systemctl restart systemd-networkd
Apr 23 03:59:40 ubuntu systemd[1]: Stopping Network Service...
Apr 23 03:59:40 ubuntu systemd[1]: systemd-networkd.service: Succeeded.
Apr 23 03:59:40 ubuntu systemd[1]: Stopped Network Service.
Apr 23 03:59:40 ubuntu systemd[1]: Starting Network Service...
Apr 23 03:59:40 ubuntu systemd-networkd[1722]: Enumeration completed
Apr 23 03:59:40 ubuntu systemd[1]: Started Network Service.
Apr 23 03:59:40 ubuntu sudo[1719]: pam_unix(sudo:session): session closed for
user root
Apr 23 03:59:40 ubuntu systemd-networkd[1722]: wlan0: IPv6 successfully enabled
Apr 23 03:59:40 ubuntu systemd-networkd[1722]: eth0: IPv6 successfully enabled
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group
default qlen 1000
link/ether dc:a6:32:57:b9:ba brd ff:ff:ff:ff:ff:ff
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state
DOWN group default qlen 1000
link/ether dc:a6:32:57:b9:bb brd ff:ff:ff:ff:ff:ff
$ networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 eth0 ether no-carrier configuring
3 wlan0 wlan no-carrier configuring
3 links listed.
I then found there is a `netplan-wpa-wlan0` systemd service that is "inactive".
Restarting it, the connection process happens, the device gets an IP from the
DHCP server (my WiFi router), and I can ping the gateway and the outside:
$ sudo systemctl status netplan-wpa-wlan0.service
● netplan-wpa-wlan0.service - WPA supplicant for netplan wlan0
Loaded: loaded (/run/systemd/system/netplan-wpa-wlan0.service; enabled-run>
Active: inactive (dead)
$ sudo systemctl restart netplan-wpa-wlan0.service
Apr 23 04:01:25 ubuntu wpa_supplicant[1752]: Successfully initialized
wpa_supplicant
Apr 23 04:01:28 ubuntu wpa_supplicant[1752]: wlan0: Trying to associate with
SSID 'ubuntu-cert-wpa'
Apr 23 04:01:30 ubuntu wpa_supplicant[1752]: wlan0: CTRL-EVENT-ASSOC-REJECT
bssid=00:00:00:00:00:00 status_code=16
Apr 23 04:01:33 ubuntu wpa_supplicant[1752]: wlan0: Trying to associate with
SSID 'ubuntu-cert-wpa'
Apr 23 04:01:35 ubuntu systemd-udevd[760]: Network interface NamePolicy=
disabled on kernel command line, ignoring.
Apr 23 04:01:35 ubuntu wpa_supplicant[1752]: wlan0: Associated with
04:d9:f5:b4:f8:b8
Apr 23 04:01:35 ubuntu wpa_supplicant[1752]: wlan0: CTRL-EVENT-CONNECTED -
Connection to 04:d9:f5:b4:f8:b8 completed [id=0 id_str=]
Apr 23 04:01:35 ubuntu wpa_supplicant[1752]: wlan0:
CTRL-EVENT-SUBNET-STATUS-UPDATE status=0
Apr 23 04:01:35 ubuntu kernel: IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link
becomes ready
Apr 23 04:01:35 ubuntu systemd-networkd[1722]: wlan0: Gained carrier
Apr 23 04:01:35 ubuntu systemd-networkd[1722]: wlan0: Connected WiFi access
point: ubuntu-cert-wpa (04:d9:f5:b4:f8:b8)
Apr 23 04:01:36 ubuntu systemd-networkd[1722]: wlan0: DHCPv4 address
192.168.1.228/24 via 192.168.1.1
Apr 23 04:01:36 ubuntu dbus-daemon[1297]: [system] Activating via systemd:
service name='org.freedesktop.hostname1'
unit='dbus-org.freedesktop.hostname1.service' requested by ':1.18' (uid=100
pid=1722 comm="/lib/systemd/systemd-networkd " label="unconfined")
Apr 23 04:01:36 ubuntu systemd-timesyncd[1209]: Network configuration changed,
trying to establish connection.
Apr 23 04:01:36 ubuntu systemd[1]: Starting Hostname Service...
Apr 23 04:02:02 ubuntu systemd-timesyncd[1209]: Initial synchronization to time
server 91.189.94.4:123 (ntp.ubuntu.com).
Apr 23 04:02:02 ubuntu dbus-daemon[1297]: [system] Successfully activated
service 'org.freedesktop.hostname1'
Apr 23 04:02:02 ubuntu systemd[1]: Started Hostname Service.
Apr 23 04:02:03 ubuntu systemd-networkd[1722]: wlan0: Gained IPv6LL
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group
default qlen 1000
link/ether dc:a6:32:57:b9:ba brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether dc:a6:32:57:b9:bb brd ff:ff:ff:ff:ff:ff
inet 192.168.1.228/24 brd 192.168.1.255 scope global dynamic wlan0
valid_lft 86344sec preferred_lft 86344sec
inet6 fe80::dea6:32ff:fe57:b9bb/64 scope link
valid_lft forever preferred_lft forever
$ networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 eth0 ether no-carrier configuring
3 wlan0 wlan routable configured
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: netplan.io 0.99-0ubuntu1
ProcVersionSignature: User Name 5.4.0-1008.8-raspi 5.4.29
Uname: Linux 5.4.0-1008-raspi aarch64
ApportVersion: 2.20.11-0ubuntu27
Architecture: arm64
CasperMD5CheckResult: skip
Date: Thu Apr 23 04:14:27 2020
SourcePackage: netplan.io
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: netplan.io (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 focal uec-images
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https://bugs.launchpad.net/bugs/1874377
Title:
Netplan does not connect to Wireless after `sudo netplan apply` until
reboot
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https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/1874377/+subscriptions
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