The problem was occurring due to the supplied modem manger from vendor,
I uninstalled the vendor's modem manager and the problem solved, the
system recognises the device and activates mobile broadband option in
network-manager applet.
** Changed in: network-manager (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1590771
Title:
Mobile Broadband does not activates after inserting usb modem in
Xubuntu 16.04.
Status in network-manager package in Ubuntu:
Invalid
Bug description:
Mobile Broadband does not activates after inserting usb modem in
Xubuntu 16.04. I have tested the modem in Ubuntu 16.04 (32 bit) and
Ubuntu-MATE (64 bit) and in both later mentioned systems, the network-
manager activates the mobile-broadband option and then I can follow to
create a connection as the network-manager recognises the device but
not for Xubuntu though the lsusb report says the device is there and I
can make that work with a script called sakis3g (www.sakis3g.com) in
Xubuntu but not with network-manager.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.0-0ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.4.0-23.41-generic 4.4.10
Uname: Linux 4.4.0-23-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Jun 9 18:55:30 2016
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
post-up iptables-restore < /etc/iptables.up.rules
InstallationDate: Installed on 2016-04-14 (55 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412)
IpRoute:
default via 10.64.64.64 dev ppp0
10.64.64.64 dev ppp0 proto kernel scope link src 10.99.108.170
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
enp2s1 ethernet unavailable /org/freedesktop/NetworkManager/Devices/1 --
-- --
wlp1s0 wifi unavailable /org/freedesktop/NetworkManager/Devices/0 --
-- --
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/2 --
-- --
ppp0 unknown unmanaged /org/freedesktop/NetworkManager/Devices/3 --
-- --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code
2: Error: Object 'nm' is unknown, try 'nmcli help'.
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