[Buildroot] wpa_supplicant not starting correctly

[Nicolas Cavallari <nicolas.cavallari@green-communications.fr>]

On 25/03/2015 21:10, Alexey Mednyy wrote:
> Hello there,
> 
> I've got configuration with eudev,dbus and  busybox init.
> Previously everything worked fine, but now wpa_supplicant not starting.
> and I see this in /var/log/messages :
> 
> Mar 25 22:56:25 hostname daemon.notice dbus[120]: [system] Activating
> service name='fi.w1.wpa_supplicant1' (using servicehelper)
> Mar 25 22:56:26 hostname daemon.info init: starting pideudev 146, tty
> '/dev/ttyS0': '/sbin/getty -L  ttyS0 0 vt100 '
> Mar 25 22:56:26 hostname daemon.notice dbus[120]: [system] Activated
> service 'fi.w1.wpa_supplicant1' failed: Failed to execute program
> fi.w1.wpa_supplicant1: Success
> 
> I'm not an expert in dbus, so asking for help what causes such problem?
> I think before some recent commit wpa_supplicant started by init script
> not by dbus is it true?

If you use network-manager or something managing wpa_supplicant, then
they have always relied on D-Bus activation to start wpa_supplicant.

You seem to not run systemd, so the standard D-Bus activation should
work.  Check that you can run wpa_supplicant normally (i.e. by running
it with the same parameters as specified in
/usr/share/dbus-1/system-services/fi.w1.wpa_supplicant1.service ).  If
it does, there is another problem.

My current supposition is that your wpa_supplicant was built without
D-Bus support.