First of all, I am not sure whether it's true that this is a bug of network-manager, but it is true that this should be a bug related with network (wifi connection).
Here is the issue:
Every time after I login into the account, about 20 minutes later, 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 (but through manual way).
By the way, during the period of wifi disconnection, I checked the "Wi-Fi Networks" by click "Select Network" in order to try to reconnect it manually. But 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 before, I cannot reconnect manually unless I reboot the system.
Finally, I set the wifi to be connected automatically after I login to the system, however, it just can't. I can only connect to the wifi manually after I login to the system.
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
---
ApportVersion: 2.20.9-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: kevin 1217 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2018-01-15 (70 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 172.24.16.148 metric 600
MachineType: Lenovo F31
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=false
NonfreeKernelModules: nvidia
Package: network-manager 1.10.6-2ubuntu1
PackageArchitecture: amd64
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic root=UUID=02a1b417-5beb-4eae-82cb-e3063372bf6d ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
RelatedPackageVersions:
linux-restricted-modules-4.15.0-13-generic N/A
linux-backports-modules-4.15.0-13-generic N/A
linux-firmware 1.173
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: bionic package-from-proposed
Uname: Linux 4.15.0-13-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/21/2008
dmi.bios.vendor: Lenovo
dmi.bios.version: Q3D31
dmi.board.name: F31
dmi.board.vendor: Lenovo
dmi.board.version: Rev 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.version: Rev 1.0
dmi.modalias: dmi:bvnLenovo:bvrQ3D31:bd07/21/2008:svnLenovo:pnF31:pvrRev1.0:rvnLenovo:rnF31:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0:
dmi.product.name: F31
dmi.product.version: Rev 1.0
dmi.sys.vendor: Lenovo
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/2
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 1.10.6 connected started full enabled enabled enabled enabled disabled
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1758589
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.