A recent breakage on Network Manager was reported today;
A downgrade to the previous Network Manager version from your package cache is the easiest temporary workaround. This will result in a partial upgrade situation (which is not recommended). Therefore, refraining from updating for a week or possibly 2 may be best until this issue is fixed.
FWIW I use Arch testing and I happen to be running that same version.
Name : networkmanager
Version : 1.28.1dev+7+g3f5df3cdc6-1
Description : Network connection manager and user applications
Architecture : x86_64
URL : https://wiki.gnome.org/Projects/NetworkManager
Licenses : GPL2 LGPL2.1
Groups : gnome
Provides : None
Depends On : libnm iproute2 polkit wpa_supplicant libmm-glib libnewt libndp libteam
curl bluez-libs libpsl audit mobile-broadband-provider-info
Optional Deps : dnsmasq: connection sharing [installed]
bluez: Bluetooth support
ppp: dialup connection support
modemmanager: cellular network support
iwd: wpa_supplicant alternative [installed]
dhclient: alternative DHCP client
openresolv: alternative resolv.conf manager
firewalld: Firewall support
Required By : network-manager-applet networkmanager-qt
Optional For : libproxy
Conflicts With : None
Replaces : None
Installed Size : 16.14 MiB
Packager : Jan Alexander Steffens (heftig) <[email protected]>
Build Date : Mon 21 Dec 2020 09:50:41 PM EST
Install Date : Sun 17 Jan 2021 08:59:21 PM EST
Install Reason : Installed as a dependency for another package
Install Script : No
Validated By : Signature
pacman -Qi networkmanager
Name : networkmanager
Version : 1.28.1dev+7+g3f5df3cdc6-1
Beschreibung : Network connection manager and user applications
Architektur : x86_64
URL : https://wiki.gnome.org/Projects/NetworkManager
Lizenzen : GPL2 LGPL2.1
Gruppen : gnome
Stellt bereit : Nichts
Hängt ab von : libnm iproute2 polkit wpa_supplicant libmm-glib libnewt libndp libteam curl bluez-libs
libpsl audit mobile-broadband-provider-info
Optionale Abhängigkeiten : dnsmasq: connection sharing [Installiert]
bluez: Bluetooth support [Installiert]
ppp: dialup connection support [Installiert]
modemmanager: cellular network support [Installiert]
iwd: wpa_supplicant alternative
dhclient: alternative DHCP client [Installiert]
openresolv: alternative resolv.conf manager [Installiert]
firewalld: Firewall support [Installiert]
Benötigt von : networkmanager-fortisslvpn networkmanager-qt networkmanager-support nm-cloud-setup
Optional für : firefox libproxy modem-manager-gui qwikaccess-git
In Konflikt mit : Nichts
Ersetzt : Nichts
Installationsgröße : 16,14 MiB
Packer : Jan Alexander Steffens (heftig) <[email protected]>
Erstellt am : Di 22 Dez 2020 03:50:41 CET
Installiert am : Sa 09 Jan 2021 02:31:38 CET
Installationsgrund : Installiert als Abhängigkeit für ein anderes Paket
Installations-Skript : Nein
Verifiziert durch : Signatur
But not verified. It could be something else, like systemd-resolved, or other, depending the installation.
I also have the same new version with no visible connection problem.
As there were two cases reporting similar breakages that were corrected by rolling back the Network Manager version I thought it produnt to report it here.
With a lot of Network Manager breakages in the past it has only affected a relatively small percentage of users. I imagine if a large percentage of installations broke, the NM update wouldn't be approved in the first place.
So, as I stated I was simply posting it as a heads up for those that might be affected is all. Luckily it doesn't seem to have affected anyone here.