I had a similar issue after upgrading from 15.04 to 15.10 yesterday
I was loosing DNS resolution ramdomly few minutes after VM start
Mar 18 10:27:17 guillaume-box NetworkManager[885]: <info> DNS: starting
dnsmasq...
Mar 18 10:27:17 guillaume-box NetworkManager[885]: <warn> dnsmasq not
available on the bus, can't update servers.
Mar 18 10:27:17 guillaume-box NetworkManager[885]: <error> [1458293237.010557]
[dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus:
Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such
name
Mar 18 10:27:17 guillaume-box NetworkManager[885]: <warn> DNS: plugin dnsmasq
update failed
Mar 18 10:27:17 guillaume-box NetworkManager[885]: <info> Writing DNS
information to /sbin/resolvconf
[...]
Mar 18 10:27:17 guillaume-box dnsmasq[965]: DBus support enabled: connected to
system bus
Mar 18 10:27:17 guillaume-box dnsmasq[965]: warning: no upstream servers
configured
I was observing, dnsmaq process indeed running but not consistently
resolving name requests. I was observing empty dnsmasq conf files:
guillaume@guillaume-box:/etc/NetworkManager/dnsmasq.d$ ls -al
total 8
drwxr-xr-x 2 root root 4096 avril 17 2015 .
drwxr-xr-x 7 root root 4096 mars 17 23:11 ..
guillaume@guillaume-box:/etc/NetworkManager/dnsmasq.d$ ls -al
/var/run/NetworkManager/dnsmasq.conf
-rw-r--r-- 1 root root 0 mars 18 10:27 /var/run/NetworkManager/dnsmasq.conf
Whereas the network manager was properly displaying the DHCP provided
DNS servers in the its UI.
Trying to turn off and on network in the network manager did not solve
the issue.
I ended up turning off dnsmasq by eding /etc/NetworkManager/NetworkManager.conf
and comment out the following line from
dns=dnsmasq (as suggested into
http://www.ubuntugeek.com/how-to-disable-dnsmasq-in-ubuntu-12-04precise.html)
This seems to have worked around the issue. I understand the limitation
of the workaround (disabling dnsmasq) is that I don't have anymore a
local DNS cache, and only the 1st respondind DNS server is queried for
address resolution.
I ran into a reported bug (sorry I lost its reference) that claimed this
to be a distribution upgrade problem, and was suggesting to uninstall
dsnmaq and reinstall it. I haven't tried yet.
Hope this helps narrowing this nasty bug which was quite time consuming
to me.
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1048430
Title:
"dnsmasq not available on the bus"
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
Dnsmasq seems to be having some issues. This occurs whenever I try to
connect to my wireless network; sometimes it only happens once, but
sometimes the error loops for a while.
Sep 9 17:43:51 bkerensa NetworkManager[935]: <info> DNS: starting dnsmasq...
Sep 9 17:43:51 bkerensa NetworkManager[935]: <error> [1347237831.899067]
[nm-dns-dnsmasq.c:390] update(): dnsmasq not available on the bus, can't update
servers.
Sep 9 17:43:51 bkerensa NetworkManager[935]: <error> [1347237831.899142]
[nm-dns-dnsmasq.c:392] update(): dnsmasq owner not found on bus: Could not get
owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
Sep 9 17:43:51 bkerensa NetworkManager[935]: <warn> DNS: plugin dnsmasq
update failed
Sep 9 17:43:51 bkerensa NetworkManager[935]: <info> ((null)): writing
resolv.conf to /sbin/resolvconf
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: dnsmasq (not installed)
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic x86_64
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
Date: Sun Sep 9 17:47:22 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: dnsmasq
UpgradeStatus: Upgraded to quantal on 2012-08-08 (32 days ago)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1048430/+subscriptions
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