[Pkg-utopia-maintainers] Bug#993749: network-manager: Connecting/creating a WWAN connection fails with gnome shell js-error in journal

[Johan Kröckel]

Package: network-manager
Version: 1.30.0-2
Severity: important
X-Debbugs-Cc: johan.kroeckel at gmail.com

When I click "connect" in the mobile broadband submenu the assistant for creating a new connection should open, but nothing happens and the journal shows:

Sep 06 00:50:10 XXXXXXXXX gnome-shell[1507]: JS ERROR: Error: Argument string may not be null
                                             _packVariant at resource:///org/gnome/gjs/modules/core/overrides/GLib.js:104:29
                                             _init/this.Variant._new_internal at resource:///org/gnome/gjs/modules/core/overrides/GLib.js:298:35
                                             launchSettingsPanel/param<@resource:///org/gnome/shell/ui/status/network.js:88:31
                                             launchSettingsPanel at resource:///org/gnome/shell/ui/status/network.js:88:22
                                             _autoConnect at resource:///org/gnome/shell/ui/status/network.js:567:28
                                             addAction/<@resource:///org/gnome/shell/ui/popupMenu.js:538:21
                                             activate at resource:///org/gnome/shell/ui/popupMenu.js:191:14
                                             vfunc_button_release_event at resource:///org/gnome/shell/ui/popupMenu.js:138:14

When I try to create the connection directly, the assistant fails at the end with:

Sep 06 00:55:56 XXXXXXXXX gnome-control-c[3357]: value "((NMSettingSerialParity) 110)" of type 'NMSettingSerialParity' is invalid or out of range for property 'parity' of type 'NMSettingSerialParity'
Sep 06 00:55:56 XXXXXXXXX NetworkManager[664]: <info>  [1630882556.8868] audit: op="connection-add-activate" pid=3357 uid=1000 result="fail" reason="Connection 'T-Mobile(Telekom) Vorgabe' is not available on device cdc-wdm0 because device is not available"
Sep 06 00:55:56 XXXXXXXXX gnome-control-c[3357]: Failed to add new connection: (2) Connection 'T-Mobile(Telekom) Vorgabe' is not available on device cdc-wdm0 because device is not available

Thanks

-- System Information:
Debian Release: 11.0
  APT prefers stable-security
  APT policy: (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-8-amd64 (SMP w/4 CPU threads)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages network-manager depends on:
ii  adduser          3.118
ii  dbus             1.12.20-2
ii  libaudit1        1:3.0-2
ii  libbluetooth3    5.55-3.1
ii  libc6            2.31-13
ii  libcurl3-gnutls  7.74.0-1.3+b1
ii  libglib2.0-0     2.66.8-1
ii  libgnutls30      3.7.1-5
ii  libjansson4      2.13.1-1.1
ii  libmm-glib0      1.14.12-0.2
ii  libndp0          1.6-1+b1
ii  libnewt0.52      0.52.21-4+b3
ii  libnm0           1.30.0-2
ii  libpsl5          0.21.0-1.2
ii  libreadline8     8.1-1
ii  libselinux1      3.1-3
ii  libsystemd0      247.3-6
ii  libteamdctl0     1.31-1
ii  libudev1         247.3-6
ii  libuuid1         2.36.1-8
ii  policykit-1      0.105-31
ii  udev             247.3-6
ii  wpasupplicant    2:2.9.0-21

Versions of packages network-manager recommends:
ii  dnsmasq-base [dnsmasq-base]  2.85-1
ii  iptables                     1.8.7-1
ii  libpam-systemd               247.3-6
ii  modemmanager                 1.14.12-0.2
ii  ppp                          2.4.9-1+1
ii  wireless-regdb               2020.04.29-2

Versions of packages network-manager suggests:
ii  isc-dhcp-client  4.4.1-2.3
pn  libteam-utils    <none>

-- no debconf information