Dear Maintainer,

Recently I've made minimal install of Debian. Due to limited resources, I
decided to try connman + iwd, despite the fact, that I experienced the same
problem earlier on.

What is happening?- PC can't connect to any other network than the one used
during install.

At first I thought that it can be caused by early state of development of
iwd package in Buster. But it turned out that the problem persists with
wpasupplicant.

I found that I'm obtaing ip, but not dns name. My /etc/resolv.conf wasn't
changed by connman and sticked to ip of gateway used during install.

After some more effort, as last resort I decided to delete file
/etc/resolv.conf, hoping that network manager will create it anew with
proper setup.

This happened indeed and solved the issue, but it definitely isn't nice
welcome to Debian with connman .