wifi,network_manager not working

[Prasun]

wifi to working in ubuntu 16.04 lts,I tried all posible solutions from internet but non of them seem working

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.6-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.10.0-30.34~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-30-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Aug 19 21:42:34 2017
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IpRoute:
 default via 192.168.0.1 dev wlp3s0
 default via 192.168.42.129 dev enp0s20u1 proto static metric 100
 169.254.0.0/16 dev enp0s20u1 scope link metric 1000
 192.168.0.0/24 dev wlp3s0 proto kernel scope link src 192.168.0.6
 192.168.42.0/24 dev enp0s20u1 proto kernel scope link src 192.168.42.128 metric 100
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.NetworkManager.conf.d.default-wifi-powersave-on.conf:
 [connection]
 wifi.powersave = 2
mtime.conffile..etc.NetworkManager.conf.d.default-wifi-powersave-on.conf: 2017-08-19T19:05:47.213845
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 enp0s20u1 ethernet connected /org/freedesktop/NetworkManager/Devices/3 Wired connection 1 e4098e84-b90e-3fe7-9353-687858ddc7f6 /org/freedesktop/NetworkManager/ActiveConnection/0
 enp2s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2 -- -- --
 wlp3s0 wifi unavailable /org/freedesktop/NetworkManager/Devices/1 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.2.6 connected starting full enabled enabled enabled enabled enabled