Arch Linux

OKAN

Member

Registered: 2009-01-11

Posts: 28

Can not connect to wifi after update

Hi,

I've searched the forum. But I colud not solve my problem. I can not connect to wireless network after system update. I can list all wireless connections on konsole but dhcpcd does not work. Also Kde network manager applet does not work. Here are my outputs: http://paste2.org/XxBjAagB

Note: Sorry for my poor english.

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,793

Website

Re: Can not connect to wifi after update

Does downgrading dhcpcd (and/or NetworkManager) fix the problem?

---

Jin, Jîyan, Azadî

Raynman

Member

Registered: 2011-10-22

Posts: 1,539

Re: Can not connect to wifi after update

You seem to be running dhcpcd.service and NetworkManager.service simultaneously. Try one at a time or (for testing) stop them both before you try connecting manually.

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,793

Website

Re: Can not connect to wifi after update

You seem to be running dhcpcd.service and NetworkManager.service simultaneously.

Not necessarily -- NetworkManager.service calls up dhcpcd.service

Use these commands to determine which .services are started up:

systemctl show -p Wants multi-user.target 
ls -l /etc/systemd/system/mult-user.target

---

Jin, Jîyan, Azadî

Raynman

Member

Registered: 2011-10-22

Posts: 1,539

Re: Can not connect to wifi after update

You seem to be running dhcpcd.service and NetworkManager.service simultaneously.

Not necessarily -- NetworkManager.service calls up dhcpcd.service

When Arch's NM was still compiled with dhcpcd support, it started dhcpcd as a subprocess for a specific interface; I've never seen it use this general service (which NM would then have to control to limit the interfaces it operates on, although that might not be entirely impossible). NM now uses dhclient (or the internal dhcp-helper if you change the config file).

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,793

Website

Re: Can not connect to wifi after update

NM now uses dhclient (or the internal dhcp-helper if you change the config file).

Ah, I see -- my apologies, I haven't used NetworkManager for a while.

---

Jin, Jîyan, Azadî

OKAN

Member

Registered: 2009-01-11

Posts: 28

Re: Can not connect to wifi after update

I stopped dhcpcd.service. I tried again. Nothing changed. Still I can list wireless connections on konsole and can not list on the system tray applet:

mkey

Member

Registered: 2015-02-09

Posts: 38

Re: Can not connect to wifi after update

Support for dhcpd has been disable since 1.0.0.2 version. You should disable dhcpcd.service entirely.

systemctl disable dhcpcd.service

In my case, I experienced a dhcp request issue using dhclient.
You can try to connect using the internal networkmanager dhcp client.

/etc/NetworkManager/NetworkManager.conf

dhcp=internal

OKAN

Member

Registered: 2009-01-11

Posts: 28

Re: Can not connect to wifi after update

But I dont understand why wireless connections does not list on network manager applet and list on the konsole?

I disabled dhcpcd.service and set dhcp=internal in the config file. Then how to get ip with dhclient?

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,793

Website

Re: Can not connect to wifi after update

Does downgrading dhcpcd (and/or NetworkManager) fix the problem?

---

Jin, Jîyan, Azadî

OKAN

Member

Registered: 2009-01-11

Posts: 28

Re: Can not connect to wifi after update

I've cleaned package cache. How can I get older version?

  sudo pacman -Ss dhcpcd
core/dhcpcd 6.8.2-1 (base) [kurulu]
    RFC2131 compliant DHCP client daemon
[kan@archkan ~]$ sudo pacman -Ss networkmanager
extra/networkmanager 1.0.2-3 [kurulu]

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,793

Website

Re: Can not connect to wifi after update

I've cleaned package cache. How can I get older version?

That was silly -- only do that when you are sure there are no problems with the new packages.

https://wiki.archlinux.org/index.php/Ar … ck_Machine

---

Jin, Jîyan, Azadî

OKAN

Member

Registered: 2009-01-11

Posts: 28

Re: Can not connect to wifi after update

Ive downgraded dhcpcd and networkmanager:

$ sudo pacman -Ss networkmanager
extra/networkmanager 1.0.2-3 [kurulu: 1.0.0-2]
$ sudo pacman -Ss dhcpcd
core/dhcpcd 6.8.2-1 (base) [kurulu: 6.7.1-1]
    RFC2131 compliant DHCP client daemon

But:

 ]# iwlist  wlp8s0  scan | less
[root@archkan kan]# iwconfig  wlp8s0 essid "NetMASTER Uydunet-5BF3" key s:**********
[root@archkan kan]# dhcpcd wlp8s0
dhcpcd[701]: sending commands to master dhcpcd process
[root@archkan kan]# dhcpcd -n
dhcpcd[707]: version 6.7.1 starting
dhcpcd[707]: wlp8s0: adding address fe80::2b0f:95e9:5600:1eac
dhcpcd[707]: if_addaddress6: Permission denied
dhcpcd[707]: DUID 00:01:00:01:1c:05:26:96:1c:75:08:6a:fe:4b
dhcpcd[707]: enp7s0: IAID 08:6a:fe:4b
dhcpcd[707]: wlp8s0: waiting for carrier
dhcpcd[707]: enp7s0: rebinding lease of 192.168.0.16
dhcpcd[707]: enp7s0: soliciting an IPv6 router
dhcpcd[707]: enp7s0: changing route to 192.168.0.0/24
dhcpcd[707]: enp7s0: changing default route via 192.168.0.1
dhcpcd[707]: forked to background, child pid 730