DNS stops working when changing networks
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
dnsmasq (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
Bug Description
Since upgrading to 16.10 I am having frequent DNS failures. It usually happens when I change networks and after resume from suspend, for example going to home from work, or vice versa. When this happens, connectivity is fine (I can ping 8.8.8.8 for instance), but I cannot resolve names (eg. google.com).
Restarting network-manager instantaneously fixes the issue.
Curiously I have not found this bug on Launchpad. Here is some related stuff I've seen:
https:/
(as described, it seems specific to Chrome)
https:/
(DNS resolution issues with VPNs, but it looks like it has been solved; at least I am not affected anymore)
http://
(forum post that describes a similar issue, but again for VPNs)
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: resolvconf 1.79ubuntu1
ProcVersionSign
Uname: Linux 4.8.0-27-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Nov 18 11:07:53 2016
InstallationDate: Installed on 2015-01-23 (664 days ago)
InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitec
SourcePackage: resolvconf
UpgradeStatus: Upgraded to yakkety on 2016-10-30 (19 days ago)
When this happens, what are the complete contents of /run/resolvconf ? (please attach as a tarball)
When this happens, do you have a dnsmasq process running for NetworkManager?
If you send dnsmasq SIGUSR1 (pkill -SIGUSR1 dnsmasq), what does it log to /var/log/syslog?