network-manager service crashes, stopping network-manager-applet, and sometimes disconnecting network

[Paul Gear]

network-manager seems to leave wpa_supplicant, dnsmasq, dhclient, and openvpn running usually, but I've also had one instance where my wifi also stopped working.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: network-manager 0.9.10.0-4ubuntu23
ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3
Uname: Linux 4.1.0-3-generic x86_64
ApportVersion: 2.18-0ubuntu7
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Aug 26 12:16:57 2015
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
ftp_proxy: ftp://127.0.0.1:3128/
http_proxy: http://127.0.0.1:3128/
nmcli-con: Error: command ['nmcli', '-f', 'all', 'con'] failed with exit code 9: Error: nmcli (0.9.10.0) and NetworkManager (unknown) versions don't match. Force execution using --nocheck, but the results are unpredictable.
nmcli-dev: Error: command ['nmcli', '-f', 'all', 'dev'] failed with exit code 8: Error: NetworkManager is not running.
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[dino99 (9d9)]

As a non-LTS release, 15.10 has a 9-month month support cycle and, as such, the support period is now nearing its end and Ubuntu 15.10 will reach end of life on Thursday, July 28th. At that time, Ubuntu Security Notices will no longer include information or updated packages for Ubuntu 15.10.