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[Bug 1436891] Re: 8086:08b3 Cannot connect to any 802.11n WiFi access points

 

If I haven't messed up anywhere, this is the first good commit:

$ git bisect bad
afcee962b09842d0f4191beb4a2d08251b4c7705 is the first bad commit
commit afcee962b09842d0f4191beb4a2d08251b4c7705
Author: Eyal Shapira <eyal@xxxxxxxxxx>
Date:   Mon Feb 9 15:18:17 2015 +0200

    iwlwifi: mvm: fix BT coex shared antenna activity check
    
    The shared antenna should be forbidden to use only if there's
    high BT activity. Comparing to BT_OFF was effectively causing
    us to always forbid using the shared antenna for SISO. This
    leads to degraded performance in scenarios where the shared
    antenna would have better performance.
    
    Signed-off-by: Eyal Shapira <eyalx.shapira@xxxxxxxxx>
    Reviewed-by: Johannes Berg <johannes.berg@xxxxxxxxx>
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>

:040000 040000 f87bafe5e9fdb8e737a17f748375818f4d147a5f
c26fc0cb302adf4e813acbbb6f3cbea1522af9bd M      drivers

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https://bugs.launchpad.net/bugs/1436891

Title:
  8086:08b3 Cannot connect to any 802.11n WiFi access points

Status in linux package in Ubuntu:
  Incomplete

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:
  https://www.kubuntuforums.net/showthread.php?67556-Can-t-use-wifi

  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
  Dependencies:
   
  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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References