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After hours of research I need some help. /:

After upgrading from 14.04 to 14.10 I'm seeing the

Waiting for network configuration

message on boot, even though my /etc/network/interfaces just contains

auto lo
iface lo inet loopback

On boot my network manager doesn't start, I need to start it manually.

When it's running, wired connection works, but wireless is really unstable – both always show a question mark next to the "connected" info.

Sometimes it works after a pkill wpa_supplicant, but disconnects after a while again.

My dmesg gives me different messages:

deauthenticating from … by local choice (Reason: 2=PREV_AUTH_NOT_VALID)

deauthenticating from … by local choice (Reason: 3=DEAUTH_LEAVING)

init: networking post-stop process (…) terminated with status 100

init: networking pre-start process (…) terminated with status 1

Additionally I have eth1 and wlan1 instead of 0.

Something seems pretty messed up, I found descriptions of some single problems, but never in combination.

I'm using a Thinkpad T430s, it has the Intel(R) Centrino(R) Advanced-N 6205 AGN chipset.

How would I continue with this?

Can I reinstall the kernel module somehow?

Thanks for any help.

  • Another check: latest firmware is installed. – Andy Nov 21 '14 at 16:59
  • Just understood that network manager starts on the "static-network-up" event, which is not fired – confirmed by the boot message. – Andy Nov 21 '14 at 17:45
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This might be Ubuntu bug 1408963.

I suspect my issue, which appears the same as yours, is one of competing network managers. In my case, wicd and network-manager. Even though I only had one of them running in my system tray (nm-applet, the GNOME front end to network-manager), I'd still mysteriously lose my connection every once in a while.

My previous "solution" was to keep restarting network-manager and then waiting to see if the renegotiated connection lasted more than ~10 seconds, but sometimes that resulted in a loop of 5-10 iterations, and sometimes I'd also need to run rmmod on each of the kernel modules starting with "iw" (in the proper order to not muck with dependencies). That would be between stopping and starting:

# old solution, often requires several tries
service network-manager stop
rmmod iwlwifi
rmmod iwldvm
modprobe iwldvm iwlwifi
service network-manager start

Reading the above bug made me think that it might be dueling network managers. So far, things look good after having stopped wicd:

service wicd stop

network-manager should automatically take back control and renegotiate your connection in a few seconds.

That said, I don't know how to reproduce this issue without merely waiting an undetermined amount of time, so this might be a bit preliminary.

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