Comment 0 for bug 1758589

First of all, I am not sure whether it's true that this is a bug of network-manager.
Here is the issue:
Every time when I login into the account, then after about 20 minutes, the wifi will be disconnected automatically. I even cannot reconnect the wifi manually, the only thing that I can do is to reboot the laptop. After login again, wifi can be connected.
By the way, during the period after wifi disconnected, I checked the "Wi-Fi Networks" by click "Select Network" in order to try to reconnect it manually, I found that there is only one SSID which previously the laptop connected to. However, I was definitely sure that there should be more than one SSID being showed in the wifi list. Even for this only one SSID, like I mentioned above, I cannot reconnect manually unless I reboot the system.
Finally, I set the wifi to be connected automatically if I login to the system, however, it just can't. I can only to manually connect the wifi after I login to the account.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: network-manager 1.10.4-1ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 24 19:02:12 2018
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2018-01-15 (68 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
IpRoute:
 default via 172.24.16.1 dev wlp4s0 proto dhcp metric 600
 169.254.0.0/16 dev wlp4s0 scope link metric 1000
 172.24.16.0/20 dev wlp4s0 proto kernel scope link src 172.24.16.69 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=false
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 wlp4s0 wifi connected /org/freedesktop/NetworkManager/Devices/3 WolfieNet-Secure eb45c742-ba31-4f31-acf2-13a2768bcc29 /org/freedesktop/NetworkManager/ActiveConnection/5
 enp5s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.10.4 connected started full enabled enabled enabled enabled disabled