[fixed]NetworkManager cant connect to wifi or ethernet

mahal · 2018-10-12 18:20:55

Hey fellows,

I have an issue with NetworkManager, archlinux and my laptop(A lenovo T480). I've installed networkManager to handle my connections. But, I've tried first with wpa_supplicant, without success (I couldn't event see the networks), so I took as backend wifi supplier iwd, and then networkManager worked again. But I had to connect to the wifi network of my school, which uses a wpa2 entreprise with a PEAP procotol that isn't available by default with iwd (kernel rebuild is needed, as pointed out here). So I tried netctl, and again, I couldn't use the wifi because netctl wasn't able to connect to the wifi spot. So I unistalled all network providers and reinstalled NetworkManager. But now, the wifi doesn't work AND the ethernet disconnected randomly. Another weird point: my polybar detects that I'm connected to a wifi but in fact, I am not.

here some logs:

the systemd's status of NetworkManager:

● NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: disabled)
  Drop-In: /usr/lib/systemd/system/NetworkManager.service.d
           └─NetworkManager-ovs.conf
   Active: active (running) since Fri 2018-10-12 09:06:07 CEST; 10h ago
     Docs: man:NetworkManager(8)
 Main PID: 4580 (NetworkManager)
    Tasks: 3 (limit: 4915)
   Memory: 7.9M
   CGroup: /system.slice/NetworkManager.service
           └─4580 /usr/bin/NetworkManager --no-daemon

oct. 12 19:48:43 *** NetworkManager[4580]: <info>  [1539366523.2924] device (wlp3s0): supplicant interface state: associated ->
oct. 12 19:48:43 *** NetworkManager[4580]: <info>  [1539366523.3819] device (wlp3s0): supplicant interface state: disconnected>
oct. 12 19:53:58 *** NetworkManager[4580]: <info>  [1539366838.7510] device (wlp3s0): set-hw-addr: set MAC address to 4A:0D:9A>
oct. 12 19:53:58 *** NetworkManager[4580]: <warn>  [1539366838.7564] sup-iface[0x55c4c64bac20,wlp3s0]: connection disconnected>
oct. 12 19:53:58 *** NetworkManager[4580]: <info>  [1539366838.7628] device (wlp3s0): supplicant interface state: inactive -> >
oct. 12 19:53:58 *** NetworkManager[4580]: <info>  [1539366838.7875] device (wlp3s0): supplicant interface state: disabled -> >
oct. 12 19:54:01 *** NetworkManager[4580]: <info>  [1539366841.5415] device (wlp3s0): supplicant interface state: inactive -> >
oct. 12 19:54:01 *** NetworkManager[4580]: <warn>  [1539366841.5416] sup-iface[0x55c4c64bac20,wlp3s0]: connection disconnected>
oct. 12 19:54:01 *** NetworkManager[4580]: <info>  [1539366841.5416] device (wlp3s0): supplicant interface state: associated ->
oct. 12 19:54:01 *** NetworkManager[4580]: <info>  [1539366841.6417] device (wlp3s0): supplicant interface state: disconnected>

when I try to execute `wpa_cli`:

Could not connect to wpa_supplicant: (nil) - re-trying

My network interfaces:

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 **** scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether *** brd ff:ff:ff:ff:ff:ff
3: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether***** brd ff:ff:ff:ff:ff:ff
    inet *** brd **** scope global dynamic noprefixroute enp0s31f6
       valid_lft 602977sec preferred_lft 602977sec
    inet6 **** scope global dynamic noprefixroute 
       valid_lft 2591813sec preferred_lft 604613sec
    inet6 *** scope link noprefixroute 
       valid_lft forever preferred_lft forever

I dont really know what to add, I've not idea of what is behind this issue.
Thanks you all for your help .

Last edited by mahal (2018-10-12 19:34:49)

jasonwryan · 2018-10-12 18:36:20

Please paste the output of: `systemctl list-unit-files --state=enabled`

mahal · 2018-10-12 18:47:30

the output is empty...

mahal · 2018-10-12 18:54:29

I've used the command with sudo and there's the output:

UNIT FILE                                   STATE  
autovt@.service                             enabled
bluetooth.service                           enabled
dbus-fi.w1.wpa_supplicant1.service          enabled
dbus-org.bluez.service                      enabled
dbus-org.freedesktop.NetworkManager.service enabled
dbus-org.freedesktop.nm-dispatcher.service  enabled
dbus-org.freedesktop.timesync1.service      enabled
display-manager.service                     enabled
getty@.service                              enabled
lightdm.service                             enabled
NetworkManager-dispatcher.service           enabled
NetworkManager-wait-online.service          enabled
NetworkManager.service                      enabled
ntpd.service                                enabled
systemd-timesyncd.service                   enabled
teamviewerd.service                         enabled
tlp-sleep.service                           enabled
tlp.service                                 enabled
wpa_supplicant.service                      enabled
remote-fs.target                            enabled

20 unit files listed.

Slithery · 2018-10-12 18:56:46

Read the note...
https://wiki.archlinux.org/index.php/Ne … k_managers

You have both NetworkManager and wpa_supplicant enabled. Choose which one you want to use and disable the other one.

mahal · 2018-10-12 19:04:19

I'm feeling so dumb, I've tested so many things, I was thinking that NetworkManager had launch the wpa_supplicant daemon... sorry about that.

edit: the problem is here again, and polybar is showing me the connection but i cant ping or use the wifi connection.

Last edited by mahal (2018-10-12 19:09:16)

jasonwryan · 2018-10-12 19:15:34

Follow the wiki wireless page and, after disabling all networking services, connect manually.

Paste exact steps and error messages.

mahal · 2018-10-12 19:23:58

By killing networkManager and restart it, deleting all network settings and recreate them, it seems to work.

edit: fixed.
But it's strange that wpa_supplicant can't work with networkManager, because networkManager uses it to connect to wifi networks.

Last edited by mahal (2018-10-12 19:32:10)

V1del · 2018-10-12 19:35:29

It's not that strange, networkmanager invokes it in a controlled way, if you enable wpa_supplicant on top of that a "separate" wpa_supplicant not under control of NetworkManager intends to handle the devices that are currently being handled by networkmanager. this leads to conflicts.

jasonwryan · 2018-10-12 19:35:34

NM manages wpa_supplicant: if you start the service there are conflicts.

Please remember to mark your thread as [Solved] by editing your first post and prepending it to the title.

mahal · 2018-10-12 19:36:39

thanks for answers and sorry for this dumb post.

Arch Linux

#1 2018-10-12 18:20:55

[fixed]NetworkManager cant connect to wifi or ethernet

#2 2018-10-12 18:36:20

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#3 2018-10-12 18:47:30

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#4 2018-10-12 18:54:29

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#5 2018-10-12 18:56:46

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#6 2018-10-12 19:04:19

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#7 2018-10-12 19:15:34

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#8 2018-10-12 19:23:58

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#9 2018-10-12 19:35:29

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#10 2018-10-12 19:35:34

Re: [fixed]NetworkManager cant connect to wifi or ethernet

#11 2018-10-12 19:36:39

Re: [fixed]NetworkManager cant connect to wifi or ethernet

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