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

[Tony Espy]

This bug was marked FixReleased based on the upload of network-manager
1.2.6-0ubuntu0.16.04.1 to xenial updates and the comments from a many
people that the issue was resolved.

Recently there were two comments (#96 and #97) that claim that the bug
still exists.  Comment #96 doesn't even list which release, and #97 has
very little detail.  For this bug, the specific case is that after S3,
NM failed to restart scanning.  So for someone to confirm they've hit
this bug, they need to use 'sudo wpa_cli' to check whether or NM is
scanning or not.  If NM's scan logic is working, you'll see CTRL-EVENT-
SCAN-RESULTS messages output by wpa_cli.

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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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