Private bug reported:

[Impact]
I am working with several programs at the same time. Like the web browser, 
Transmission, and others. And it has happened to me twice today. The led of my 
USB Wifi adapter is always on and there is no packet transfer. Then the 
NetworkManager asks me for the password. Suggesting me in the small window with 
hidden characters. Press 'OK' and ask me again. 'I forget' the password and add 
it again. And I do not accept it either. I had to change the USB Wifi adapter 
several times in USB ports. And suddenly it works again.
 
[Test Case]
- Turn on the Notebook
- Open programs that use WiFi intensely (Transmission)
- Wait a few hours
- Internet traffic is blocked
- NetworkManager requests the password of the SSID that I use
- Login password
- Does not accept the password
- I forgot SSID data
- Context the SSID that I use
- Ask for a password again
- Does not accept Password
- Change USB ports with my WiFi USB adapter
- And after a few minutes, it is correctly connected again.

Others:
Attach: $_journalctl_-f.txt When this happens

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: network-manager 1.16.0-0ubuntu2
Uname: Linux 5.0.7-050007-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 13 19:36:13 2019
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2018-12-02 (132 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
IpRoute:
 
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to disco on 2018-12-02 (132 days ago)
nmcli-dev:
 DEVICE                   TYPE      STATE         IP4-CONNECTIVITY  
IP6-CONNECTIVITY  DBUS-PATH                                  CONNECTION  
CON-UUID  CON-PATH 
 wlx98ded0105daf          wifi      disconnected  limited           limited     
      /org/freedesktop/NetworkManager/Devices/2  --          --        --       
 p2p-dev-wlx98ded0105daf  wifi-p2p  disconnected  none              none        
      /org/freedesktop/NetworkManager/Devices/3  --          --        --       
 lo                       loopback  unmanaged     unknown           unknown     
      /org/freedesktop/NetworkManager/Devices/1  --          --        --
nmcli-nm:
 RUNNING  VERSION  STATE         STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN    
 running  1.16.0   disconnected  started  limited       enabled     enabled  
enabled  enabled  enabled

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug disco wayland-session

** Attachment added: "$ journalctl -f"
   
https://bugs.launchpad.net/bugs/1824665/+attachment/5255532/+files/%24_journalctl_-f.txt

** Summary changed:

- Disconnects from WiFi
+ Disconnects from WiFi (SSID)

** Information type changed from Public to Private

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1824665

Title:
  Disconnects from WiFi (SSID)

Status in network-manager package in Ubuntu:
  New

Bug description:
  [Impact]
  I am working with several programs at the same time. Like the web browser, 
Transmission, and others. And it has happened to me twice today. The led of my 
USB Wifi adapter is always on and there is no packet transfer. Then the 
NetworkManager asks me for the password. Suggesting me in the small window with 
hidden characters. Press 'OK' and ask me again. 'I forget' the password and add 
it again. And I do not accept it either. I had to change the USB Wifi adapter 
several times in USB ports. And suddenly it works again.
   
  [Test Case]
  - Turn on the Notebook
  - Open programs that use WiFi intensely (Transmission)
  - Wait a few hours
  - Internet traffic is blocked
  - NetworkManager requests the password of the SSID that I use
  - Login password
  - Does not accept the password
  - I forgot SSID data
  - Context the SSID that I use
  - Ask for a password again
  - Does not accept Password
  - Change USB ports with my WiFi USB adapter
  - And after a few minutes, it is correctly connected again.

  Others:
  Attach: $_journalctl_-f.txt When this happens

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: network-manager 1.16.0-0ubuntu2
  Uname: Linux 5.0.7-050007-generic x86_64
  ApportVersion: 2.20.10-0ubuntu27
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Apr 13 19:36:13 2019
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2018-12-02 (132 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  IpRoute:
   
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to disco on 2018-12-02 (132 days ago)
  nmcli-dev:
   DEVICE                   TYPE      STATE         IP4-CONNECTIVITY  
IP6-CONNECTIVITY  DBUS-PATH                                  CONNECTION  
CON-UUID  CON-PATH 
   wlx98ded0105daf          wifi      disconnected  limited           limited   
        /org/freedesktop/NetworkManager/Devices/2  --          --        --     
  
   p2p-dev-wlx98ded0105daf  wifi-p2p  disconnected  none              none      
        /org/freedesktop/NetworkManager/Devices/3  --          --        --     
  
   lo                       loopback  unmanaged     unknown           unknown   
        /org/freedesktop/NetworkManager/Devices/1  --          --        --
  nmcli-nm:
   RUNNING  VERSION  STATE         STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN    
   running  1.16.0   disconnected  started  limited       enabled     enabled  
enabled  enabled  enabled

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