Since upgrading to yakkety my network sometimes stops working - it might be related to suspending the laptop. The NetworkManager-managed caching dnsmasq just stops resolving at some point:
dig google.com @127.0.1.1
; <<>> DiG 9.10.3-P4-Ubuntu <<>> google.com @127.0.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 22521
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;google.com. IN A
;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Sat Oct 29 09:12:33 CEST 2016
;; MSG SIZE rcvd: 28
Networking and upstream DNS are fine:
dig google.com @8.8.8.8
; <<>> DiG 9.10.3-P4-Ubuntu <<>> google.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63345
;; flags: qr rd ra; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;google.com. IN A
;; ANSWER SECTION:
google.com. 299 IN A 46.134.208.30
[...]
;; Query time: 43 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sat Oct 29 09:12:31 CEST 2016
;; MSG SIZE rcvd: 295
Killing it resolves the issue, dnsmasq gets restarted and works again:
ps aux | grep dnsmasq
nobody 4262 0.0 0.0 54308 2740 ? S 01:30 0:00 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/NetworkManager/dnsmasq.pid --listen-address=127.0.1.1 --cache-size=0 --conf-file=/dev/null --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d
sudo kill 4262
dig google.com @127.0.1.1
; <<>> DiG 9.10.3-P4-Ubuntu <<>> google.com @127.0.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58324
;; flags: qr rd ra; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;google.com. IN A
;; ANSWER SECTION:
google.com. 299 IN A 46.134.208.59
[...]
;; Query time: 41 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Sat Oct 29 09:12:54 CEST 2016
;; MSG SIZE rcvd: 295
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: dnsmasq (not installed)
ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
Uname: Linux 4.8.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Oct 29 09:13:04 2016
InstallationDate: Installed on 2016-05-06 (175 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: dnsmasq
UpgradeStatus: No upgrade log present (probably fresh install)
---
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.10
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2016-05-06 (175 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=false
WWANEnabled=true
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
Package: network-manager 1.2.4-0ubuntu1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
Tags: yakkety third-party-packages
Uname: Linux 4.8.0-26-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip libvirt libvirtd lpadmin lxd plugdev sambashare sbuild sudo vboxusers
_MarkForUpload: True
modified.conffile..etc.polkit-1.localauthority.50-local.d.org.freedesktop.NetworkManager.pkla: [deleted]
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
running 1.2.4 connected started full enabled enabled disabled enabled enabled
apport information