Public bug reported:
Hi
I did a Focal install on 14th of May 2020, could work until in the night
of 16th of May 2020 and in the morning of the 18th of May 2020 I could
not resolve domain names anymore. I can ping DNS servers but the
resolution to IP addresses fails. I have switched on automatic
installation of security relevant updates.
I can reproduce the behaviour with a fresh install accepting all the
updates there are. I did not try to find out which update is the cause.
See the behaviour below where I even have tried to work around by removing the
DNS server of my router:
thiemo @ Fujitsu-HO ~ :-( % systemd-resolve --status
20-05-18 12:54
Global
LLMNR setting: no
MulticastDNS setting: no
DNSOverTLS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNSSEC NTA: 10.in-addr.arpa
16.172.in-addr.arpa
168.192.in-addr.arpa
17.172.in-addr.arpa
18.172.in-addr.arpa
19.172.in-addr.arpa
20.172.in-addr.arpa
21.172.in-addr.arpa
22.172.in-addr.arpa
23.172.in-addr.arpa
24.172.in-addr.arpa
25.172.in-addr.arpa
26.172.in-addr.arpa
27.172.in-addr.arpa
28.172.in-addr.arpa
29.172.in-addr.arpa
30.172.in-addr.arpa
31.172.in-addr.arpa
corp
d.f.ip6.arpa
home
internal
intranet
lan
local
private
test
Link 2 (enp0s25)
Current Scopes: DNS
DefaultRoute setting: yes
LLMNR setting: yes
MulticastDNS setting: no
DNSOverTLS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 139.18.25.33
139.18.25.34
77.59.232.36
62.167.241.5
62.2.107.35
62.2.121.84
62.2.121.88
fd00::7eff:4dff:feaa:2528
2001:638:902:1::10
DNS Domain: ~.
thiemo @ Fujitsu-HO ~ % host -v myworkspaceinet.post.ch
20-05-18 12:54
Trying "myworkspaceinet.post.ch"
;; connection timed out; no servers could be reached
thiemo @ Fujitsu-HO ~ :-( % alias pong
20-05-18 12:55
pong='ping -c3'
thiemo @ Fujitsu-HO ~ % pong 139.18.25.33
20-05-18 12:58
PING 139.18.25.33 (139.18.25.33) 56(84) bytes of data.
64 bytes from 139.18.25.33: icmp_seq=1 ttl=246 time=39.9 ms
64 bytes from 139.18.25.33: icmp_seq=2 ttl=246 time=39.0 ms
64 bytes from 139.18.25.33: icmp_seq=3 ttl=246 time=39.4 ms
--- 139.18.25.33 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 39.000/39.431/39.868/0.354 ms
Kind regards
Thiemo
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: network-manager 1.22.10-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Mon May 18 13:03:40 2020
InstallationDate: Installed on 2020-05-15 (3 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
IpRoute:
default via 192.168.178.1 dev enp0s25 proto dhcp metric 100
169.254.0.0/16 dev enp0s25 scope link metric 1000
192.168.178.0/24 dev enp0s25 proto kernel scope link src 192.168.178.33 metric
100
IwConfig:
enp0s25 no wireless extensions.
lo no wireless extensions.
RfKill:
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
NAME UUID TYPE TIMESTAMP
TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY
DBUS-PATH ACTIVE DEVICE STATE
ACTIVE-PATH SLAVE FILENAME
Wired connection 1 3ce8a4c9-c011-3344-bbfd-9618a499a099 ethernet 1589799780
Mon May 18 13:03:00 2020 yes -100 no
/org/freedesktop/NetworkManager/Settings/1 yes enp0s25 activated
/org/freedesktop/NetworkManager/ActiveConnection/1 --
/etc/NetworkManager/system-connections/Wired connection 1.nmconnection
nmcli-dev:
DEVICE TYPE STATE IP4-CONNECTIVITY IP6-CONNECTIVITY DBUS-PATH
CONNECTION CON-UUID
CON-PATH
enp0s25 ethernet connected full full
/org/freedesktop/NetworkManager/Devices/2 Wired connection 1
3ce8a4c9-c011-3344-bbfd-9618a499a099
/org/freedesktop/NetworkManager/ActiveConnection/1
lo loopback unmanaged unknown unknown
/org/freedesktop/NetworkManager/Devices/1 -- --
--
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI
WWAN-HW WWAN
running 1.22.10 connected started full enabled enabled
enabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1879326
Title:
DNS resolution ceased to work after update
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