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[Bug 1483998] Re: System freezes when changing network preferences

 

Just adding a precision : Caps Lock is blinking when the freeze happens,
sign of Kernel Panic ?

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https://bugs.launchpad.net/bugs/1483998

Title:
  System freezes when changing network preferences

Status in bcmwl package in Ubuntu:
  Triaged

Bug description:
  I have Ubuntu 15.04 on a unmodified August 2014 Macbook Pro Retina 13
  inch with i7. The only proprietary driver running is bcmwl. Because of
  the fact that freezing happens immediately on changing Network
  settings, I think that bcmwl is the cause.

  Symptoms:
  System freezes completely, screen does not turn off.

  Occasions:
  A)
  If NetworkManager selected one Wifi to connect, and I click on a different one to connect, sometimes system freezes.

  B) After setting up wifi without IPv4 (set IPv4 on “ignore” in Network
  Manager) and connect it to IPv6, it first looks fine. “ping6
  google.com” works like expected. When then starting Firefox or XChat
  IRC, System freezes.

  Notes:
  - I do have a native IPv6 Internet connection
  - I experienced no such problems with Ubuntu 14.10, so I guess it is related to kernel/bcmwl compatibility, since the driver version used to be the same.
  - there are no logs in /var/crash

  bcmwl version:
  6.30.223.248+bdcom-0ubuntu2

  kernel version:
  3.19.0-25-generic

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
  Uname: Linux 3.19.0-25-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1.2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Aug 12 08:51:08 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-11-15 (269 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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References