Perhaps this can help: The symptoms I experience started sometime during
the past year after an update (sudo apt update && sudo apt upgrade &&
sudo apt autoremove) are that some indefinite time (usually less than ½
hour) after I log on, the network disconnects without warning or error.
Clicking on the up/down arrows of the indicator plugin and selecting the
interface reconnects; however, I recently discovered that if, as soon as
I log on, I select "Disconnect" and then select the adapter to
reconnect, my session will be fine until I log out and back in again. So
perhaps the bug is not with network-manager, samba or ifupdown, but with
the logon process(es). My version is 18.04 and I'm using LiteDM GTK+. I
haven't the faintest idea where to look for a cause that might be
related to the logon process(s), but none of the very many "solutions"
offered on various web pages I found on the problem have fixed it for
me.
One other unexpected thing I've noticed is that in editing Ethernet
connections (I don't used wireless enough to have noticed a problem), I
can't edit (or delete) the one the system creates without first adding
another (even if it's the same, e.g., enp2s0, with the same settings)
and switching to it; however, after I did that the first time, and
deleted the system's entry ("Wired connection 1", I think it was
called), at some point the system added another entry, identical in
every way to the one I had added, but called "Ifupdown (enp2s0)" and
connects to that when I log on, not to the one I created (which I have
since deleted, but the original problem still occurs, and disconnecting
and reconnecting still prevents the random disconnect).
All of this applies to 2 other machines, also running up-to-date xubuntu
18.04, although on one of the other machines, the adapter is enp4s25. It
also occurs with xubuntu and xfce sessions. I suspect the difficutly in
finding the cause(s) is in part due to the confusing way samba/network
settings are stored, with the same setting sometimes stored in different
locations, entered via GUI or command line or both, possibly leading to
conflicts.
I have spent many hours on this problem, and have only the above work-
around, not a fix. Even though this problem has been around longer than
18.04, since 18.04, samba has clearly been broken, and until networking
is as reliable and as easy to set up as in Windows, (x/l/k)ubuntu will
not be suitable for typical home users.
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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/1666432
Title:
Internet drops every few minutes on wired and wireless connection
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
Internet drops every 1-30 minutes when connected via wired or wireless
(i.e., this is a problem on both wired and wireless) even though
connection icon indicates the computer is still connected.
Disconnecting and reconnecting via the connection icon resets internet
temporarily until the next time.
Dropped internet is discovered with "The site can't be reached"
screens in Chromium, or error messages when downloading/updating in
Terminal, or missing connection in Ubuntu Software app, or stalled
syncing in Insync application (occurred even without Insync).
Internet drops more frequently on wireless than on wired.
It seems to disconnect more frequently with heavier internet use
(e.g., downloading multiple files, opening several webpages in quick
succession).
This is a fresh install (yesterday) of Ubuntu 16.04 on a Dell Inspiron
15 5567 (dual boot). It occurs when running Live CD as well though.
Ethernet and wifi both work without randomly disconnecting in Windows
10 on the same machine, and ethernet and wifi work on other machines
running Ubuntu and Windows with the same router, so it is not a
hardware or router issue.
Output from sudo lshw -class network
*-network
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 79
serial: 58:fb:84:55:21:52
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical
wireless
configuration: broadcast=yes driver=iwlwifi
driverversion=4.4.0-62-generic firmware=17.352738.0 ip=192.168.1.15 latency=0
link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:283 memory:df100000-df101fff
*-network
description: Ethernet interface
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 07
serial: 18:db:f2:3c:d5:37
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet
physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169
driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12
latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:279 ioport:d000(size=256) memory:df000000-df000fff
memory:d0300000-d0303fff
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.2-0ubuntu0.16.04.3
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Feb 21 16:36:55 2017
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2017-02-20 (1 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
IpRoute:
default via 192.168.1.1 dev wlp2s0 proto static metric 600
169.254.0.0/16 dev wlp2s0 scope link metric 1000
192.168.1.0/24 dev wlp2s0 proto kernel scope link src 192.168.1.15
metric 600
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
wlp2s0 wifi connected /org/freedesktop/NetworkManager/Devices/0
pr500k-9912ec-1 36301ded-0ac5-4a86-9621-87290ef159af
/org/freedesktop/NetworkManager/ActiveConnection/5
enp3s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/1 --
-- --
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/2 --
-- --
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW
WIFI WWAN-HW WWAN
running 1.2.2 connected started full enabled enabled
enabled enabled enabled
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