[Bug 1585863] Re: WiFi malfunction after suspend & resume stress - sudo wpa_cli scan required to fix it.

[JaSauders]

I noticed that NM 1.2.2 hit proposed yesterday. I pulled down proposed
but did not see a change with NM 1.2.2 (i.e. I was still seeing the
issue), though after re-reading Aron's message, it sounds like the fix
is not 1.2.2, but the fix can be applied to 1.2.2 once it becomes
available. Anyway, after this I added the testing PPA fourdollars
provided to my main laptop (1 of 5 wireless devices I have that are
seeing this issue). I've had it running for the last day or so. As of
now I have not seen the issue come up after adding the PPA. Whatever was
changed in the PPA (which I can't lie, I'm rather curious to know) seems
to have done the trick.

While I could instigate the wireless issue before by closing/opening my
laptop lid only a few times (this issue was a quite simple roll of the
dice, not difficult to notice, further confusing me as to why it wasn't
tackled before release but that's another conversation), the real
culprit that seemed to always cause it was when my laptop was suspended
for several hours. Even after an all-night suspend, the laptop resumed
from suspend without issue and connected to wifi this morning.

Thank you folks for the testing PPA. Fingers crossed this issue can be
fixed soon!

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https://bugs.launchpad.net/bugs/1585863

Title:
  WiFi malfunction after suspend & resume stress - sudo wpa_cli scan
  required to fix it.

Status in NetworkManager:
  New
Status in OEM Priority Project:
  New
Status in OEM Priority Project xenial series:
  New
Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  Description:    Ubuntu Yakkety Yak (development branch)
  Release:        16.10
  Packages:
  libnm-glib-vpn1:amd64   1.2.2-0ubuntu2
  libnm-glib4:amd64       1.2.2-0ubuntu2
  libnm-util2:amd64       1.2.2-0ubuntu2
  libnm0:amd64    1.2.2-0ubuntu2
  network-manager 1.2.2-0ubuntu2

  Reproduce steps:
  1. Install fwts by `sudo apt-get install fwts`.
  2. Run the suspend & resume stress test.
  sudo fwts s3 --s3-multiple=30 --s3-min-delay=5 --s3-max-delay=5 --s3-delay-delta=5

  Expected result:
  The WiFi still functioned.

  Actual result:
  The WiFi can not connect to any access point and we have to execute `sudo wpa_cli scan` manually to make it work again.

  P.S. Ubuntu 16.04 also has the same issue.

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