Bug#996753: systemd: After bullseye upgrade: DNS does not work after changing wireless networks or suspending laptop

[Michael Biebl]

Control: reassign -1 ifupdown

Am 18.10.21 um 09:42 schrieb Joel Cross:
> Package: systemd
> Version: 249.5-1
> Severity: important
> X-Debbugs-Cc: joel+debbugs at kazbak.co.uk
> 
> Dear Maintainer,
> 
> I run a testing/sid setup. After a recent PackageKit upgrade (it might have
> been the 11.0 or 11.1 upgrade) there are serious usability issues with the
> wifi. To reproduce (on my system):
> 
> * Switch the computer on and connect to a wireless network -> everything is
> fine
> * Switch to a different wireless network -> it is possible to ping IP addresses
> but DNS resolution does not work. Changing /etc/resolv.conf has no effect
> 
> Additionally, running 'resolvctl status' yields this error:
> Failed to get global data: Unit dbus-org.freedesktop.resolve1.service not
> found.
> (I mention this because it might be related)

This means systemd-resolved is not enabled, i.e. you don't use 
systemd-resolved. Which is fine, you don't need systemd-resolved 
(currently it defaults to disabled anyway).

> This has been a consistent issue since the upgrade, meaning I need to restart
> my laptop multiple times per day just to get a working internet connection. I
> have tried 'systemctl restart networking' (which fails with another error) and
> multiple other ways, but the only reliable fix I have found is to restart my
> entire system.

networking.service is provided by ifupdown, a separate package not under 
systemd's control.

Assuming that you control your network configuration with ifupdown, I'm 
going to reassign the bug report accordingly. It's more likely that they 
can help you debug your network related problems.

If it turns out to be an actual issue in systemd, please reassign back.

Michael

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