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giuscri

Member

From: Milan, Italy

Registered: 2013-08-19

Posts: 21

[SOLVED] systemd+wpa_supplicant, but the name of interfaces changes

Hello,

I'm following instructions here for having the wireless connection ready at boot on my machine.

I needed to setup two different daemons since sometimes my wireless interfaces is wlp3s0 and sometimes is wlan0.

When the name of the interface is wlp3s0 everything works fine and I'm correctly given an IP address.

It doesn't happen the same when the name is wlan0.

Here's some output

$ systemctl status network-wireless@wlan0.service -l
● network-wireless@wlan0.service - Wireless network connectivity (wlan0)
   Loaded: loaded (/etc/systemd/system/network-wireless@.service; enabled)
   Active: inactive (dead)

Jun 22 16:10:19 banzi systemd[1]: Dependency failed for Wireless network connectivity (wlan0).

$ cat /etc/conf.d/network-wireless@wlan0
address=192.168.1.10
netmask=24
broadcast=192.168.1.255
gateway=192.168.1.1

$ cat /etc/conf.d/network-wireless@wlp3s0
address=192.168.1.8
netmask=24
broadcast=192.168.1.255
gateway=192.168.1.1

$ cat /etc/systemd/system/network-wireless@.service
[Unit]
Description=Wireless network connectivity (%i)
Wants=network.target
Before=network.target
BindsTo=sys-subsystem-net-devices-%i.device
After=sys-subsystem-net-devices-%i.device

[Service]
Type=oneshot
RemainAfterExit=yes
EnvironmentFile=/etc/conf.d/network-wireless@%i

ExecStart=/usr/bin/ip link set dev %i up
ExecStart=/usr/bin/wpa_supplicant -B -i %i -c /etc/wpa_supplicant/wpa_supplicant.conf
ExecStart=/usr/bin/ip addr add ${address}/${netmask} broadcast ${broadcast} dev %i
ExecStart=/usr/bin/ip route add default via ${gateway}

ExecStop=/usr/bin/ip addr flush dev %i
ExecStop=/usr/bin/ip link set dev %i down

[Install]
WantedBy=multi-user.target

What more info do you need?, what's wrong?

Thanks,

Giuseppe

Last edited by giuscri (2014-06-28 19:53:35)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,354

Re: [SOLVED] systemd+wpa_supplicant, but the name of interfaces changes

Check your journal for messages relating to wlan0 and wlp3s0.  I think you may find some kind of error message -- maybe having to do with firmware.  I've seen thing like that break predicatible device names

If you've just one wlan interface, you could turn off predicable device names and just go with wlan0

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giuscri

Member

From: Milan, Italy

Registered: 2013-08-19

Posts: 21

Re: [SOLVED] systemd+wpa_supplicant, but the name of interfaces changes

I went for the easier path. As ewaller suggested I had only one wlan interface, hence I turned off predicable device names via editing the grub configuration file from `/etc/default/grub`.