i just installed xubuntu-16.04.1-desktop-amd64.iso and have seen the same (or
slight variation of the same) behavior a few times over the last several days.
machine is a thinkpad x220. lshw identifies the networking h/w as:
- ethernet: 82579LM Gigabit Network Connection
- wireless: Centrino Advanced-N 6205 [Taylor Peak]
first failure case:
- connect to wireless network, become active network participant.
- attach ethernet cable, become active network participant.
- disconnect ethernet cable.
- both wired and wireless networks were now in disconnected state, wireless
did not reconnect automatically, and there was no list of networks from which
to select a connection.
another failure case:
- use laptop on wireless
- put to sleep
- wake laptop
- same symptoms: both wired and wireless networks were now in disconnected
state, wireless did not reconnect automatically, and there was no list of
networks from which to select a connection.
this has happened several times, but note that it doesn't happen _every_
time.
when it does occur, there are two workarounds which will cause the laptop to
resume normal operation:
- sudo service NetworkManager restart
or
- sudo iwlist scan
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1591515
Title:
Network manager can't disconnect from wifi or connect to another wifi
Status in network-manager package in Ubuntu:
Incomplete
Bug description:
After fresh install 16.04 I can't connect to different wifi network
and if netbook lost wifi connection I need reboot it because NM can't
do anything to reconnect. NM don't show connected wifi name. I
attached image that show this bug.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.0-0ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
Uname: Linux 4.4.0-24-generic i686
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: i386
CRDA:
country BY: DFS-ETSI
(2402 - 2482 @ 40), (N/A, 20), (N/A)
(5170 - 5250 @ 80), (N/A, 20), (N/A)
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS
(5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
CurrentDesktop: Unity
Date: Sat Jun 11 16:37:25 2016
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2016-05-14 (27 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1)
IpRoute:
default via 192.168.100.1 dev wlp2s0 proto static metric 600
169.254.0.0/16 dev wlp2s0 scope link metric 1000
192.168.100.0/24 dev wlp2s0 proto kernel scope link src 192.168.100.8
metric 600
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
NAME UUID TYPE
TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY
READONLY DBUS-PATH ACTIVE DEVICE STATE
ACTIVE-PATH
HUAWEI-KpW2 3a8b63e2-b64e-4e64-b374-4fd453ccf5ec 802-11-wireless
1465652043 Sat 11 Jun 2016 16:34:03 MSK yes 0 no
/org/freedesktop/NetworkManager/Settings/1 yes wlp2s0 activated
/org/freedesktop/NetworkManager/ActiveConnection/2
Wired connection 1 32e99c74-fafd-483a-aa6f-745655ff5e9f 802-3-ethernet
1465650077 Sat 11 Jun 2016 16:01:17 MSK yes 4294966297 no
/org/freedesktop/NetworkManager/Settings/2 no -- -- --
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
wlp2s0 wifi connected /org/freedesktop/NetworkManager/Devices/2
HUAWEI-KpW2 3a8b63e2-b64e-4e64-b374-4fd453ccf5ec
/org/freedesktop/NetworkManager/ActiveConnection/2
enp1s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/1 --
-- --
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 --
-- --
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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