[Bug 1982553] Re: Search domains not working after upgrading to Ubuntu 22.04

[Jon Schewe]

That worked. I notice that the date on the incorrect /etc/resolv.conf
file is the same date that I upgraded from 20.04 to 22.04.

>resolvectl
Global
       Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: stub

Link 2 (enp8s0f1)
    Current Scopes: DNS
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.42.1
       DNS Servers: 192.168.42.1
        DNS Domain: mn.mtu.net

Link 3 (wlp0s20f3)
    Current Scopes: DNS
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.46.1
       DNS Servers: 192.168.46.1
        DNS Domain: mn.mtu.net

Link 4 (vboxnet0)
Current Scopes: none
     Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

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https://bugs.launchpad.net/bugs/1982553

Title:
  Search domains not working after upgrading to Ubuntu 22.04

Status in netplan.io package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  Hello,

  After upgrading to Ubuntu 22.04, I noticed that search domains are not
  working anymore.

  Either I configure search domains via netplan or with graphical "nm-
  connection-editor", this is not taken into account when resolving
  domain names.

  For instance if I configure "domain.com" in search domains list,
  looking for "host" does not look for "host.domain.com". This is
  confirmed with a wireshark capture. Consequently if I want to connect
  with SSH to host.domain.com, I have to type the entire url.

  In Ubuntu 20.04 this works correctly. With a packet capture I can see
  one domain lookup for each of my search domains configured.

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