during recovery mode, enable network failed due to /etc/resolv.conf not being present

Bug #1682637 reported by themusicgod1 on 2017-04-13
This bug affects 8 people
Affects Status Importance Assigned to Milestone
network-manager (Ubuntu)
thermald (Ubuntu)

Bug Description

Something went wrong that required me to boot to recovery mode via grub. The important part here, is that while I got as far as the recovery screen asking to "Enable Networking" and other options fsck filesystems, drop to root shell, etc.

and selected "Enable Networking":

the result was:

grep: /etc/resolv.conf: No such File or directory.

Unknown group "power" in message bus configuration file.

(Networking did not enable, leaving me stranded at root shell without network which would have made adding/removing packages to troubleshoot easier)

Ubuntu: zesty 17.04
Linux: Linux Hedy 4.10.0-19-generic #21-Ubuntu SMP Thu Apr 6 17:04:57 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
network-manager: 1.4.4-1ubuntu3

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: network-manager 1.4.4-1ubuntu3
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Apr 13 16:40:19 2017
EcryptfsInUse: Yes
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2014-07-09 (1009 days ago)
InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Alpha amd64 (20140708)
 default via dev wlan1 proto static metric 600 dev lxcbr0 proto kernel scope link src linkdown dev lxcbr0 scope link metric 1000 linkdown dev wlan1 proto kernel scope link src metric 600

SourcePackage: network-manager
UpgradeStatus: Upgraded to zesty on 2017-04-13 (0 days ago)
 lxcbr0 bridge connected /org/freedesktop/NetworkManager/Devices/3 lxcbr0 46595dd8-757b-4d93-ade3-c066f72d9e2e /org/freedesktop/NetworkManager/ActiveConnection/0
 wlan1 wifi connected /org/freedesktop/NetworkManager/Devices/2 Brisbane House 2b25e748-f9c5-4c84-9fe6-0f64071fcf0b /org/freedesktop/NetworkManager/ActiveConnection/1
 eth1 ethernet unavailable /org/freedesktop/NetworkManager/Devices/1 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
 running 1.4.4 connected started full enabled enabled enabled enabled disabled

themusicgod1 (themusicgod1) wrote :
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in network-manager (Ubuntu):
status: New → Confirmed
aleandro (aleandrodasilva) wrote :

Here the same. I upgraded from 16.10 to 17.04. Network is not active. I cannot surf in internet.

themusicgod1 (themusicgod1) wrote :

but did you boot into recovery mode in grub? Might be a different bug if not

aleandro (aleandrodasilva) wrote :

I booted into recovery to see if there the network was working again.

It is a bug of Networkmanager. Probably the username 'power' doesn't affect the connection.


sudo -H gedit /etc/NetworkManager/NetworkManager.conf

At the bottom of this file, copy and paste the following:


Restart the networkmanager

sudo service network-manager restart

themusicgod1 (themusicgod1) wrote :

So editing NetworkManager.conf didn't help.
I did some digging though and found that in /etc/dbus-1/system.d in element busconfig in org.freedesktop.thermald.conf:

        <policy group="power">
                <allow send_destination="org.freedesktop.thermald"/>
                <allow receive_sender="org.freedesktop.thermald"/>

this is owned by thermald

thermald: 1.5.4-4

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in thermald (Ubuntu):
status: New → Confirmed
starkus (starkus) wrote :

Booting to recovery mode and trying to enable networking tells me Unknown group "power" in message bus configuration file.

And networking will not be available running 17.04 ubuntu-gnome.

Daniel Pietrucha (texar) wrote :

To to establish connection run:

dpkg-reconfigure resolvconf

eth connection is working in my case

Hannu N (garbage-collector-) wrote :

I can confirm "Daniel Pietrucha (texar)"'s experience.

Boot into the recovery console and run
# dpkg-reconfigure resolvconf

# apt update # worked immediately afterwards.

Domizio Demichelis (domizio) wrote :

None of the above worked here! Without the /etc/resolv.conf nothing works obviously, then the dpkg-reconfigure resolvconf does nothing (i.e. there is still no file after running it. Adding it manually solved a part of the problem, but the Unknown group "power" still blocks starting of the network. How to fix that one?

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