Re: disconnects because of "assertion `dev != NULL' failed"

[Dan Williams <dcbw redhat com>]

On Fri, 2008-04-04 at 10:34 +0200, Michael Biebl wrote:
> Hi,
> 
> I'm using NM/nm-applet 0.6.6 and I'm very frequently encountering the
> problem, that when I manually activate a connection via nm-applet,
> (wireless, wpa secured connection) right after it has established the
>  connection, it is dropped again. NM logs a message like this:
> 
> [network selected in nm-applet, NM establishing the connection]
> 2008-04-04T10:21:36.580197+02:00 pluto NetworkManager: <info>  Activation (wlan0) Finish handler scheduled.
> 2008-04-04T10:21:36.580346+02:00 pluto NetworkManager: <info>  Activation (wlan0) Stage 5 of 5 (IP Configure Commit) complete.
> 2008-04-04T10:21:36.721959+02:00 pluto NetworkManager: <debug> [1207297296.721629] nm_dbus_signal_filter(): NetworkManagerInfo triggered update of
> wireless network 'wgrouter'
> [Connection is established]
> 2008-04-04T10:21:36.723000+02:00 pluto NetworkManager: <info>  SWITCH: terminating current connection 'wlan0' because it's no longer valid.
> 2008-04-04T10:21:36.723018+02:00 pluto NetworkManager: <info>  Deactivating device wlan0.
> 2008-04-04T10:21:37.824829+02:00 pluto NetworkManager: nm_device_is_802_3_ethernet: assertion `dev != NULL' failed
> 2008-04-04T10:21:37.824975+02:00 pluto NetworkManager: nm_device_is_802_11_wireless: assertion `dev != NULL' failed
> 2008-04-04T10:21:52.680002+02:00 pluto NetworkManager: <debug> [1207297312.679612] nm_device_802_11_wireless_get_activation_ap(): Forcing AP 'wgrouter'
> 2008-04-04T10:21:52.680038+02:00 pluto NetworkManager: <info>  User Switch: /org/freedesktop/NetworkManager/Devices/wlan0 / wgrouter
> 2008-04-04T10:21:52.680055+02:00 pluto NetworkManager: <info>  Deactivating device wlan0.
> [Connection is dropped again]
> 
> If I try again, NM usually manages to successfully establish a connection
> on the seconnd attempt.
> Is this a known problem? Any advice how I can get this fixed/debugged?
> 
> This problem is very annoying so I'd be thankfull for every help.

I think you're hitting ~ line 455 in NetworkManagerPolicy.c:

	if (do_switch && (nm_device_is_802_3_ethernet (new_dev) || (nm_device_is_802_11_wireless (new_dev) && ap)))

which just prints stuff out but doesn't actually affect operation.

Dan