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

auspex auspex at pointerstop.ca
Fri Feb 3 09:29:31 UTC 2017


Seems to me that if NM stalls due to a race condition, then restarting NM
*is* a workaround, so yes, adding additional scripts to systemd is a
solution, but not the "answer".

derek

On Fri, Feb 3, 2017 at 1:11 AM, Tony Espy <1585863 at bugs.launchpad.net>
wrote:

> @Kevin
>
> NetworkManager already has code to monitor system signals related to
> suspend/resume, so no adding additional scripts to /usr/lib/systemd
> /system-sleep isn't the answer.
>
> @Dan
>
> Different bug...  this bug is caused by NetworkManager's WiFi scanning
> logic stalling due to a race condition.  You can tell this by running
> 'sudo wpa_cli' and watching for scan events.  If you don't see any, then
> you've hit the bug.
>
> I've also unfortunately confirmed that dropping the original patch from
> 1.2.6 doesn't fix the problem either.  I tried a cycle of 100 with my
> version of 1.2.6 with the original ScanDone patch dropped and I still
> tripped the bug.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1448555).
> https://bugs.launchpad.net/bugs/1585863
>
> Title:
>   WiFi malfunction after suspend & resume stress - sudo wpa_cli scan
>   required to fix it.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/oem-priority/+bug/1585863/+subscriptions
>

-- 
You received this bug notification because you are a member of Ubuntu
Sponsors Team, which is subscribed to the bug report.
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:
  New
Status in OEM Priority Project xenial series:
  Confirmed
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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/oem-priority/+bug/1585863/+subscriptions



More information about the Ubuntu-sponsors mailing list