cannot view wifi networks after resume from suspend

[Yuriy Vidineev]

Hello,
On 2 laptops (Dell XPS13 9360 with ath10k and Lenovo T530 with iwlwifi) I have the same issue:
After resume from suspend nm-applet doesn't show any information about connected/available wi-fi connections. Please see screenshot in attach.
I can see current connection via CLI:

nmcli dev
DEVICE TYPE STATE CONNECTION
docker0 bridge connected docker0
wlp58s0 wifi connected Turris
lo loopback unmanaged --

Now I have to run `killall nm-applet && nm-applet &` after every suspend. That fixes my issue

I think it's a duplicate of https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1589401 but I was asked to submit separate bug

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.6-0ubuntu0.16.04.2
Uname: Linux 4.15.0-041500rc9-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Feb 11 19:41:21 2018
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
EcryptfsInUse: Yes
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2016-10-06 (493 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
IpRoute:
 default via 192.168.1.1 dev wlp58s0 proto static metric 600
 169.254.0.0/16 dev docker0 scope link metric 1000 linkdown
 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
 192.168.1.0/24 dev wlp58s0 proto kernel scope link src 192.168.1.137 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
 docker0 bridge connected /org/freedesktop/NetworkManager/Devices/1 docker0 440d4ade-78be-45c3-a821-903971861d0c /org/freedesktop/NetworkManager/ActiveConnection/0
 wlp58s0 wifi connected /org/freedesktop/NetworkManager/Devices/3 Turris e9dddd63-362e-4e4a-ac98-54af278d348d /org/freedesktop/NetworkManager/ActiveConnection/88
 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 started full enabled enabled enabled enabled enabled

[Yuriy Vidineev (adeptg)]

Here is how nm-applet looks after restart (killall nm-applet && nm-applet &)

[Shih-Yuan Lee (fourdollars)]

`Uname: Linux 4.15.0-041500rc9-generic x86_64` is not the kernel that Ubuntu supported.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Kai-Heng Feng (kaihengfeng)]

So what does it look like before restart?

[GrzesiekC (grzesiekc)]

The same here:

Linux E7470 4.13.0-33-generic #36~16.04.1-Ubuntu SMP Wed Feb 7 23:32:33 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

[Yuriy Vidineev (adeptg)]

Shih-Yuan Lee,

> `Uname: Linux 4.15.0-041500rc9-generic x86_64` is not the kernel that Ubuntu supported.

I have this bug on a wide range of kernels from 4.4 to 4.15 We completely the same behaviour. On 2 laptops with different wi-fi adapters (ath10k and iwlwifi kernel modules)

Here is complete list of installed kernel versions and on every kernel I have this bug.

linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1
linux-image-4.10.0-33-generic 4.10.0-33.37~16.04.1
linux-image-4.10.0-35-generic 4.10.0-35.39~16.04.1
linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1
linux-image-4.10.0-38-generic 4.10.0-38.42~16.04.1
linux-image-4.10.0-40-generic 4.10.0-40.44~16.04.1
linux-image-4.10.0-42-generic 4.10.0-42.46~16.04.1
linux-image-4.13.0-26-generic 4.13.0-26.29~16.04.2
linux-image-4.13.0-31-generic 4.13.0-31.34~16.04.1
linux-image-4.13.0-32-generic 4.13.0-32.35~16.04.1
linux-image-4.13.11-041311-generic 4.13.11-041311.201711020532
linux-image-4.13.3-041303-generic 4.13.3-041303.201709200606
linux-image-4.13.4-041304-generic 4.13.4-041304.201709270931
linux-image-4.14.0-041400-generic 4.14.0-041400.201711122031
linux-image-4.14.2-041402-generic 4.14.2-041402.201711240330
linux-image-4.14.7-041407-generic 4.14.7-041407.201712171031
linux-image-4.14.8-041408-generic 4.14.8-041408.201712200555
linux-image-4.15.0-041500-generic 4.15.0-041500.201802011154
linux-image-4.15.0-041500rc9-generic 4.15.0-041500rc9.201801212130
linux-image-4.4.0-101-generic 4.4.0-101.124
linux-image-4.4.0-103-generic 4.4.0-103.126
linux-image-4.4.0-104-generic 4.4.0-104.127
linux-image-4.4.0-109-generic 4.4.0-109.132
linux-image-4.4.0-112-generic 4.4.0-112.135
linux-image-4.4.0-93-generic 4.4.0-93.116
linux-image-4.4.0-96-generic 4.4.0-96.119
linux-image-4.4.0-97-generic 4.4.0-97.120
linux-image-4.4.0-98-generic 4.4.0-98.121
linux-image-4.8.0-58-generic 4.8.0-58.63~16.04.1
linux-image-4.9.32-040932-generic 4.9.32-040932.201706141032
linux-image-extra-4.10.0-32-generic 4.10.0-32.36~16.04.1
linux-image-extra-4.10.0-33-generic 4.10.0-33.37~16.04.1
linux-image-extra-4.10.0-35-generic 4.10.0-35.39~16.04.1
linux-image-extra-4.10.0-37-generic 4.10.0-37.41~16.04.1
linux-image-extra-4.10.0-38-generic 4.10.0-38.42~16.04.1
linux-image-extra-4.10.0-40-generic 4.10.0-40.44~16.04.1
linux-image-extra-4.10.0-42-generic 4.10.0-42.46~16.04.1
linux-image-extra-4.13.0-26-generic 4.13.0-26.29~16.04.2
linux-image-extra-4.13.0-31-generic 4.13.0-31.34~16.04.1
linux-image-extra-4.13.0-32-generic 4.13.0-32.35~16.04.1
linux-image-extra-4.4.0-101-generic 4.4.0-101.124
linux-image-extra-4.4.0-103-generic 4.4.0-103.126
linux-image-extra-4.4.0-104-generic 4.4.0-104.127
linux-image-extra-4.4.0-109-generic 4.4.0-109.132
linux-image-extra-4.4.0-112-generic 4.4.0-112.135
linux-image-extra-4.4.0-93-generic 4.4.0-93.116
linux-image-extra-4.4.0-96-generic 4.4.0-96.119
linux-image-extra-4.4.0-97-generic 4.4.0-97.120
linux-image-extra-4.4.0-98-generic 4.4.0-98.121
linux-image-extra-4.8.0-58-generic 4.8.0-58.63~16.04.1
linux-image-generic 4.4.0.112.118
linux-image-generic-hwe-16.04 4.13.0.32.52

[Yuriy Vidineev (adeptg)]

Kai-Heng Feng, you can see screenshot before restart in original bug description:

> screenshot of nm-applet before restart

[Shih-Yuan Lee (fourdollars)]

It looks like it is a preloaded Ubuntu system.
Could you help to provide some logs as the followings?

/etc/buildstamp
`sudo mount /dev/sda2 /mnt` or `sudo mount /dev/nvme0n1p2 /mnt` and then attach /mnt/bto.xml
dpkg -l > dpkg.log and then attach dpkg.log

[Yuriy Vidineev (adeptg)]

Yes it's Dell XPS 13 that comes with Ubuntu 16.04 preinstalled. But I have the same issue on Lenovo T530 where I installed Ubuntu manually.

From Dell XPS 13 9360:

/etc/buildstamp
kakaduplum Fri, 24 Jun 2016 10:26:40 +0000
somerville-xenial-amd64-20160624-2

There is no /mnt/bto.xml. Here is list of files I have on /dev/nvme0n1p2:

boot casper debs dell-e-star dists efi.factory factory install installer isolinux md5sum.txt pool prepackage.dell preseed scripts

Please find dpkg.log in attachment

[Shih-Yuan Lee (fourdollars)]

Could you also provide `lspci -nnk > lspci.log`?

[Yuriy Vidineev (adeptg)]

Sure. Please find it in attachment

[Kai-Heng Feng (kaihengfeng)]

I guess something went south when NM is signaling "wireless-enabled" signal. The culprit can be either NetworkManager or NetworkManager-Applet.

How do you suspend your laptops?

[Shih-Yuan Lee (fourdollars)]

Dell XPS 13 9360 should be preloaded with kernel 4.4 + the generic xorg package instead of LTS Enablement Stacks [1].
But your system looks like LTS Enablement Stacks are installed according to the dpkg.log in comment #10.
Did you install LTS Enablement Stacks by yourself?

[1]: https://wiki.ubuntu.com/Kernel/LTSEnablementStack

[Yuriy Vidineev (adeptg)]

Kai-Heng Feng, just closing the lid.

Shih-Yuan Lee, yes, I've installed by myself. I need recent kernel version for USB C docking stations support

[Kai-Heng Feng (kaihengfeng)]

Is this 100% reproducible?

[Yuriy Vidineev (adeptg)]

Kai-Heng Feng, yes

[Yuriy Vidineev (adeptg)]

One more detail: this bug is for wireless networks only. Looks like wired works as expected (please see "Dell docking" on screenshot)

[Kai-Heng Feng (kaihengfeng)]

I got XPS 9360 at hand, but unfortunately I can't reproduce the issue.

Can you try the latest Xenial (16.04) image here?
http://cdimages.ubuntu.com/xenial/daily-live/current/

[Yuriy Vidineev (adeptg)]

Hi Kai-Heng!
I still see this bug. I'll try to reproduce it with liveUSB

[Yuriy Vidineev (adeptg)]

I wasn't able to reproduce it with liveUSB and only one Wi-Fi connection. Will try to add more connections (few openvpn probably)

[Alfred (alf-redyoung)]

From comment 40 in upper stream bug - https://bugzilla.gnome.org/show_bug.cgi?id=767317#c40
Upgrade to higher version(1.8) of NM should fix this. However xenial is stuck in 1.2.6... So I think 18.04 upgrade can fix this - which NM is 1.8.10.