Re: NM+WPA_Supplicant+Systemd trouble: can't connect to WLAN

[Dan Williams <dcbw redhat com>]

On Tue, 2014-09-09 at 05:42 -0400, Pavel Simerda wrote:
> ----- Original Message -----
> > From: "Mark Elkins" <mje posix co za>
> > To: networkmanager-list gnome org
> > Sent: Saturday, September 6, 2014 10:55:18 AM
> > Subject: Re: NM+WPA_Supplicant+Systemd trouble: can't connect to WLAN
> >
> > I run Gentoo and had huge issues when upgrading to Systemd. I chose to
> > go Mate to get back the old feel. Created the following script which
> > unless I run, Wifi will not work. ie Things currently currently appear
> > to start up in the wrong order.
> >
> > systemctl stop NetworkManager
> > killall -9 wpa_supplicant
> > killall -9 wpa_supplicant
> > systemctl start NetworkManager
>
> You just need to ensure there's no service enabled that would interfere with NetworkManager and after 
> reboot everything should be nice and happy. There are a couple of things that are different when using 
> systemd but I don't think any of them is specifically related to wifi, except maybe some gentoo specific 
> conf.

NetworkManager uses DBus to communicate with wpa_supplicant, and if it
doesn't fine a running instance it will spawn one using dbus service
activation.  wpa_supplicant's DBus interface is enabled with the "-u"
command-line parameter at supplicant launch time.

So, if you have a systemd supplicant service that does not have "-u" in
the command-line, it's quite possible that two will get spawned, and
then fight for the wifi card.  Make sure that doesn't happen by always
using "-u" when starting the supplicant.

Dan

> Pavel
>
> > On Fri, 2014-09-05 at 16:14 -0400, Nickolai Dobrynin wrote:
> > > Dear all,
> > >
> > > I've Googled my stomach off and tried to get help on Gentoo
> > > (my distro of choice) forums:
> > >
> > > http://forums.gentoo.org/viewtopic-t-998728.html?sid=87a26a7434ce0489cf77789f1377f141
> > >
> > > Nobody knows anything, so here I am.  Long story short: I can't
> > > get the NM+WPA_Supplicant+Systemd combo to connect to WiFi.
> > > I depend on a WiFi for my installation and have no wired Internet access.
> > > Everything works via DHCPCD (with NM off), but when I disable DHCPCD
> > > and fire the NM up instead, it creates a WPA Supp instance which says:
> > >
> > > wlp3s0: Associated to a new BSS: BSSID=88:dc:96:03:5b:28
> > > wlp3s0: No keys have been configured - skip key clearing
> > > wlp3s0: Select network based on association information
> > > wlp3s0: No network configuration found for the current AP
> > > wlp3s0: Request to deauthenticate - bssid=88:dc:96:03:5b:28
> > > pending_bssid=00:00:00:00:00:00 reason=3 state=ASSOCIATED
> > > wpa_driver_nl80211_deauthenticate(addr=88:dc:96:03:5b:28 reason_code=3)
> > > wlp3s0: Event DEAUTH (12) received
> > > wlp3s0: Deauthentication notification
> > > wlp3s0: * reason 3 (locally generated)
> > >
> > > This is happens in response to
> > >
> > >   $ iw dev wlp3s0 connect <name>
> > >
> > > which I execute manually, and the network is public and unsecured.
> > >
> > > Since WPA Supplicant functions well with DHCPCD, this, to me, indicates
> > > a NetworkManager-related issue.
> > >
> > > I am seeking as much information as possible on how to troubleshoot this.
> > > Don't know if this is relevant but my wireless driver is iwlwifi.
> > >
> > > Many thanks.
> > > _______________________________________________
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> > > networkmanager-list gnome org
> > > https://mail.gnome.org/mailman/listinfo/networkmanager-list
> >
> > --
> > Mark James ELKINS  -  Posix Systems - (South) Africa
> > mje posix co za       Tel: +27.128070590  Cell: +27.826010496
> > For fast, reliable, low cost Internet in ZA: https://ftth.posix.co.za
> >
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