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

[Shih-Yuan Lee]

There are many duplicated bugs.
Including this bug, all point to the race conditions, and Aron's patch set are all about the solutions for those race conditions.
If we want to identify every race conditions and the logs, that will be incredibly tedious workloads.
Imaging that we need to de-duplicate those bugs, categorize those bugs and provided the fixes for each bug.

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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 OEM Priority Project:
  Triaged
Status in OEM Priority Project xenial series:
  Triaged
Status in network-manager package in Ubuntu:
  Fix Released

Bug description:
  HOW TO REPRODUCE:
  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

  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.

  WORKAROUND:
  (http://askubuntu.com/questions/761180/wifi-doesnt-work-after-suspend-after-16-04-upgrade)

  SYSTEM INFO:
  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

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