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[Bug 1436891] Re: Cannot connect to any WiFi access point which runs wireless-N



Bug exists in first Vivid version (3.16.0-23.31) that's readily
available in pre-packaged .deb format.  So I need to start building
kernels, I presume, to check 3.16.0-0.1 (since I don't yet have a "good"
kernel within Vivid) and bisect from there.

I'm still trying to figure out how to build specific versions.  Or, how
to find a commit corresponding to the start of Vivid.

I also tried Utopic's 3.16.0-34.45, and the bug is not present there --
I can connect to wifi N just fine with that one.  I presume that the
versions for Utopic and Vivid don't map directly onto each other?

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  Cannot connect to any WiFi access point which runs wireless-N

Status in linux package in Ubuntu:

Bug description:
  When attempting to connect to a WiFi access point with N wireless, two popup messages appear:
  Connection 'SSID' deactivated.
  The WiFi network could not be found

  Expected behaviour:  Connects to network.

  Minimal demonstration:  connect to a WiFi access point by both LAN and
  WiFi B/G.  Log in to access point, change it to B/G/N.  Connection is
  lost, cannot be re-established until reverted to B/G.

  Previous troubleshooting located here:

  Description:    Ubuntu Vivid Vervet (development branch)
  Release:        15.04
  linux-firmware 1.143

  Can connect normally (with N) from 14.04.2 and 14.10 live CDs.  Can
  connect in 15.04 if and only if N deactivated in access point.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-firmware 1.143
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  Uname: Linux 3.19.0-10-generic x86_64
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Fri Mar 27 00:14:58 2015
  InstallationDate: Installed on 2015-03-04 (22 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150224.1)
  PackageArchitecture: all
  SourcePackage: linux-firmware
  UpgradeStatus: No upgrade log present (probably fresh install)

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