Score:0

Ubuntu

wifi problem on ubuntu 20.04 after upgrade

BELHAJ Mohammed

11/1/22, 9:38 AM

I installed ubuntu LTS 20.04 server on Raspberry 4 Model B and I tested the wifi it works well,but when i upgraded ubuntu the wifi is not working after this upgrade, Have you any idea about this problem?

thank you in advance.

1 + 6

upgrade

server

updates

wireless

Minsky

11/1/22, 11:12 AM

Did you check the `journalctl -e | grep NetworkManager`? That's where the service writes logs to.

BELHAJ Mohammed

11/1/22, 11:18 AM

Nothing appears

Minsky

11/1/22, 11:41 AM

run `systemctl restart NetworkManager.service` or try `systemctl start NetworkManager.service` and see if it works

BELHAJ Mohammed

11/1/22, 11:47 AM

Failed to start NetworkManager.service ,Unit NetworkManager not found

Minsky

11/1/22, 11:50 AM

Ok you could try installing a file, but before that try rebooting pc, and running the command I wrote again

BELHAJ Mohammed

11/1/22, 11:56 AM

yep. I rebooted Raspberry Pi and I executed the commands you wrote but not working

Score:0

Ubuntu

Minsky

11/1/22, 12:11 PM

This is what I would do:

ls /lib/systemd/system/NetworkManager.service

double check that the output it's not found

If the file is not there, add the service unit back

[Unit]
Description=Network Manager
Documentation=man:NetworkManager(8)
Wants=network.target
After=network-pre.target dbus.service
Before=network.target 

[Service]
Type=dbus
BusName=org.freedesktop.NetworkManager
ExecReload=/usr/bin/busctl call org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager Reload u 0
#ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/sbin/NetworkManager --no-daemon
Restart=on-failure
# NM doesn't want systemd to kill its children for it
KillMode=process
CapabilityBoundingSet=CAP_NET_ADMIN CAP_DAC_OVERRIDE CAP_NET_RAW CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_SYS_MODULE CAP_AUDIT_WRITE CAP_KILL CAP_SYS_CHROOT

ProtectSystem=true
ProtectHome=read-only

[Install]
WantedBy=multi-user.target
Also=NetworkManager-dispatcher.service

# We want to enable NetworkManager-wait-online.service whenever this service
# is enabled. NetworkManager-wait-online.service has
# WantedBy=network-online.target, so enabling it only has an effect if
# network-online.target itself is enabled or pulled in by some other unit.
Also=NetworkManager-wait-online.service

Save into NetworkManager.service

Run sudo mv NetworkManager.service /lib/systemd/system/
start the service using systemctl start NetworkManager.service

Then update and upgrade.

0 + 4

BELHAJ Mohammed

11/1/22, 1:33 PM

I created the file NetworkManager in the /lib/systemd/system/NetworkManager.service and and I did what you wrote sir but don't worked with me

Minsky

11/1/22, 2:05 PM

What is the output?

BELHAJ Mohammed

11/1/22, 3:51 PM

here is the output of the 2 commands :ubuntu@ubuntu:/lib/systemd/system$ sudo mv NetworkManager.service /lib/systemd/system/ mv: 'NetworkManager.service' and '/lib/systemd/system/NetworkManager.service' are the same file ubuntu@ubuntu:/lib/systemd/system$ systemctl start NetworkManager.service Job for NetworkManager.service failed because the control process exited with error code. See "systemctl status NetworkManager.service" and "journalctl -xe" for details.

Minsky

11/1/22, 3:59 PM

It's telling you to run `journalctl -xe` after the last command

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: wifi problem on ubuntu 20.04 after upgrade

TH: ปัญหา wifi บน Ubuntu 20.04 หลังจากอัปเกรด

RO: Problemă wifi pe ubuntu 20.04 după upgrade

RU: проблема с Wi-Fi на Ubuntu 20.04 после обновления

VI: sự cố wifi trên Ubuntu 20.04 sau khi nâng cấp

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.