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hradecek

Member

From: Slovakia

Registered: 2014-01-23

Posts: 15

[SOLVED] WiFi connection problems

Hello, I was using connection to the Internet only through ethernet (which works fine) and when I'm trying connect wirelessly i'm having some issues.
I killed or stopped all dhcpcd, NetworkManager, widc, etc...

First of all my driver status:

$ lspci -k
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 2200 (rev c4)
	Subsystem: Intel Corporation Centrino Wireless-N 2200 BGN
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

Getting up interface doesn't give me any errors:

# ip link set wlp3s0 up

Also firmware has been loaded:

$ dmesg | grep firmware
[    8.983661] iwlwifi 0000:03:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm

Now, i'm trying to connect manually:

$ iw dev wlp3s0 link # OK
Not connected

# ip link set wlp3s0 up # OK

$ ip link show wlp3s0 # OK
3: wlp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether <MAC> brd ff:ff:ff:ff:ff:ff

# wpa_passphrase "SSID "PASSPHRASE" > /etc/wpa_supplicant/wpa_supplicant.conf # OK

# wpa_supplicant -i wlp3s0 -c /etc/wpa_supplicant/wpa_supplicant.conf # OK
Successfully initialized wpa_supplicant
wlp3s0: SME: Trying to authenticate with <MAC> (SSID='SSID' freq=2462 MHz)
wlp3s0: Trying to associate with<MAC> (SSID='SSID' freq=2462 MHz)
wlp3s0: Associated with <MAC>
wlp3s0: WPA: Key negotiation completed with <MAC> [PTK=CCMP GTK=TKIP]
wlp3s0: CTRL-EVENT-CONNECTED - Connection to <MAC> completed [id=0 id_str=]

$ iw dev wlp3s0 link # OK
Connected to 94:44:52:7e:0b:36 (on wlp3s0)
...

# dhcpcd wlp3s0  # Problem
DUID ....
wlp3s0: IAID ....
wlp3s0: soliciting a DHCP lease
wlp3s0: soliciting an IPv6 router
wlp3s0: no IPv6 Routers available
timed out
dhcpcd exited

# pkill dhcpcd

# sudo dhcpcd wlp3s0 -4 # Same problem
DUID <some address>
wlp3s0: IAID <some address>
wlp3s0: soliciting a DHCP lease
timed out
dhcpcd exited

Thanks in advance.

Last edited by hradecek (2016-06-21 08:06:26)

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ayekat

Member

Registered: 2011-01-17

Posts: 1,616

Re: [SOLVED] WiFi connection problems

I don't quite see the issue... it seems to be properly connected to the access point via WPA.

EDIT On the other hand, given how you described your problem (which is: not at all), I'm just going to assume that your intentions are to establish a working connection to the network, which consists (among other things) of obtaining an IP address and setting a DNS server. Both things are handled by `dhcpcd`, which does not seem to be done in your given code snippets.

In particular

systemctl start dhcpcd

Ignore this, I haven't seen the scroll bar in the code tag. I'm sorry for the noise.

Last edited by ayekat (2015-11-28 15:53:26)

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Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,333

Website

Re: [SOLVED] WiFi connection problems

Ayekat, the problem seems to be that dhcpcd is timing out. (EDIT for the above edit: Ayekat, the OP is properly running dhcpcd in the code snippets.  Scroll down, read the whole thing.)

hradecek, in the code snippets your provided you do not background wpa_supplicant.  Do you leave it running and go to another terminal to run dhcpcd?

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hradecek

Member

From: Slovakia

Registered: 2014-01-23

Posts: 15

Re: [SOLVED] WiFi connection problems

I'm trying to connect to my home wi-fi network. I'm not using systemd at the moment. After some experiments and like 5 resets of my wi-fi router I have managed to connect to it.
So I guess it is kinda broken or at least it is behaving weird, which I wasn't assuming.

Anyway thanks for your time

EDIT: @Trilby: Yeah sorry, i was pasting stuff from many terminals. Of course 'wpa_supplicant' was running haha. I think I'm not that "newbie" haha.

Last edited by hradecek (2015-11-28 15:55:27)

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$ perl -wle '$_ = 1; (1 x $_) !~ /^(11+)\1+$/ && print while $_++'

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,349

Re: [SOLVED] WiFi connection problems

Also, the obvious question, is there a DHCP server running on that network?  Is it a router or another computer?  It is managed and not ad-hoc, right?

What is the output of iw wlp3s0 info   after the failed dhcpcd?
As a data point, have you tried dhclient instead of dhcpcd

Do you own the router (or whatever is running the DHCP server) and do you have access to its logs?

Edit:  We were posting at the same time.

Last edited by ewaller (2015-11-28 15:57:00)

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