True, the upgrade completed successfully but without DNS which is reasonable because I don't think that a user needs a network connection after the files were downloaded. But I experience Wi-Fi disconnects once in a while.
Anyway, I tried to figure out what might be the reason for the absent of DNS. During the upgrade I choosed to keep my files when asked to keep or change to the distro one's. I tried to remember which files I kept and checked for network related files and I found that my NetworkManager.conf was different from the distro file which was copied to /etc/NetworkManager during the upgrade. My old file: [main] plugins=ifupdown,keyfile,ofono dns=dnsmasq no-auto-default=aa:bb:cc:dd:ee:ff, [ifupdown] managed=false The distro file: [main] plugins=ifupdown,keyfile [ifupdown] managed=false [device] wifi.scan-rand-mac-address=no So, I decided to use the distro file instead my old file and now the DNS works. What I see now in syslog which might be related and I don't see when I used 8.8.8.8 as a workaround is this: Oct 10 09:47:58 systemd-resolved[335]: Using degraded feature set (UDP) for DNS server a.b.c.d. Oct 10 09:57:05 systemd-resolved[335]: Grace period over, resuming full feature set (UDP+EDNS0) for DNS server a.b.c.d. Oct 10 10:06:35 systemd-resolved[335]:Using degraded feature set (UDP) for DNS server a.b.c.d. On Tue, 08 Oct 2019 20:06:40 -0000 Dan Streetman <[email protected]> wrote: > > During the upgrade which was done using Wi-Fi, the connection went > down but it was after the download completed so the upgrade ended. > > sorry, it's not clear to me, are you saying the upgrade completed > successfully? > > And do you mean that currently, your dns does not work? > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1816530 > > Title: > DNS servers are not being set in the system correctly when you upgrade > from 16.04 to 18.04 > > Status in resolvconf package in Ubuntu: > Invalid > > Bug description: > I upgraded my 16.04 to 18.04 before the official release. After the > upgrade I noticed that I don't have internet access. The wired network > and the wifi settings looked good, but the internet didn't work. After > the login the system always switched itself into airplane mode. I > tethered the network via USB and Bluetooth by my mobile but they also > didn't work. > > I found a useful answer from @andrew-woodhead666: > https://answers.launchpad.net/ubuntu/+question/665374 > > it seems this bug is still not fixed for the upgraded dists in the main > release and affects a few dozens of ubuntu users. > > https://askubuntu.com/questions/1021884/no-internet-after-upgrade-from-16-04-to-18-04 > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1816530/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1816530 Title: DNS servers are not being set in the system correctly when you upgrade from 16.04 to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1816530/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
