Re: NM attempts connecting to nonexistent AP

[poma <pomidorabelisima gmail com>]

On 25.12.2015 00:38, Robby Workman wrote:
> On Thu, 11 Sep 2014 16:47:45 -0500
> Dan Williams <dcbw redhat com> wrote:
>
> > On Wed, 2014-09-10 at 22:53 -0500, Robby Workman wrote:
> > > Summary: when resuming from sleep, NM attempts to connect to an AP
> > > that no longer exists.  
> >
> > Hmm, odd.  You could turn on debugging and enable the "wifi_scan" log
> > domain to see what's going on at resume time.  NM should be throwing
> > away the scan list on resume and requesting a new scan from
> > wpa_supplicant, and all that should be reflected in the debug logs
> > when the wifi_scan domain is enabled.
>
>
> I filed this away to debug later, and "later" never arrived :/
>
> However, a user on LQ reported some dbus messages getting rejected on
> suspend:
>
> http://www.linuxquestions.org/questions/slackware-14/current-xfce4-power-manager-error-messages-on-suspend-resume-4175562257/#post5468365
>
> I'm seeing those here too:
>
> Dec 22 17:13:54 liberty dbus[1162]: [system] Rejected send message, 4 matched \
>   rules; type="method_call", sender=":1.66" (uid=1000 pid=5803 \
>   comm="xfce4-power-manager ") interface="org.freedesktop.NetworkManager" \
>   member="Sleep" error name="(unset)" requested_reply="0" \
>   destination="org.freedesktop.NetworkManager" \
>   (uid=0 pid=1198 comm="/usr/sbin/NetworkManager ")
> Dec 22 17:16:41 liberty dbus[1162]: [system] Rejected send message, 4 matched \
>   rules; type="method_call", sender=":1.66" (uid=1000 pid=5803 \
>   comm="xfce4-power-manager ") interface="org.freedesktop.NetworkManager" \
>   member="Sleep" error name="(unset)" requested_reply="0" \
>   destination="org.freedesktop.NetworkManager" \
>   (uid=0 pid=1198 comm="/usr/sbin/NetworkManager ")
>
> I notice that /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf says
> that they are root-only functions:
>
>   <!-- Root-only functions -->
>   <deny send_interface="org.freedesktop.NetworkManager" send_member="SetLogging"/>
>   <deny send_interface="org.freedesktop.NetworkManager" send_member="Sleep"/>
>
> and if I change it to allow one of my groups, then I no longer get those 
> logged Rejected messages.
>
> So... three questions here:
>
> 1) is this possibly related to my original problem report? I'm not able to
> test it just yet and won't be until I go back to work after the holidays.
>
> 2) is xfce4-power-manager supposed to be calling that Sleep here? There is
> a configure option to --(en|dis)able-network-manager that is currently
> enabled in our build, but if it should be disabled, we can fix that.

"Inform the Network Manager when we do suspend/hibernate "
http://git.xfce.org/xfce/xfce4-power-manager/tree/src/xfpm-network-manager.c#n31

Can be switched off:
$ xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/network-manager-sleep -n -t bool -s false

Any difference after?


Xfconf-query
http://docs.xfce.org/xfce/xfconf/xfconf-query