Martin Steigerwald - 22.07.23, 16:34:30 CEST:
> 1041703 Broken due to missed udev dependencies
>
> https://bugs.debian.org/1041703
>
> Otherwise no keyboard and mouse input in sddm or lightdm (and likely
> other display managers), no working fwupdmgr and likely other issues
> and crashes.

Temporary measure to prevent accidental upgrade:

% cat /etc/apt/preferences.d/libgudev
Explanation: #1041703: Broken due to missed udev dependencies
Package: libgudev-1.0-0
Pin: version 237-2
Pin-Priority: 30000

Thanks,
--
Martin