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[Brian Burch <1415880@xxxxxxxxxxxxxxxxxx>]

I have been running 6.30.223.248+bdcom-0ubuntu1 on trusty 14.04.1 LTS
for several weeks.

I applied the patch suggested by Andre yesterday, and haven't seen any
kernel crashes yet. However, I am still seeing occasional (once per hour
approx) loss of connectivity. A typical syslog extract is below:

Feb  2 23:47:12 bacchus wpa_supplicant[1287]: message repeated 25 times: [ wlan0: CTRL-EVENT-SCAN-STARTED ]
Feb  2 23:48:50 bacchus wpa_supplicant[1287]: wlan0: WPA: Group rekeying completed with 00:12:0e:54:e9:a4 [GTK=CCMP]
Feb  2 23:49:12 bacchus wpa_supplicant[1287]: wlan0: CTRL-EVENT-SCAN-STARTED 
Feb  3 00:03:12 bacchus kernel: [ 3848.216125] ERROR @wl_notify_scan_status : wlan0 Scan_results error (-22)
Feb  3 00:07:12 bacchus kernel: [ 4088.258526] ERROR @wl_notify_scan_status : wlan0 Scan_results error (-22)

I have just checked the syslog and the error was also being logged prior
to applying the patch. I wonder whether this error is relevant to this
bug - sorry if it isn't.

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https://bugs.launchpad.net/bugs/1415880

Title:
  bcmwl-kernel source: fix for null pointer crash

Status in bcmwl package in Ubuntu:
  Incomplete

Bug description:
  The bcmwl package as of now misses one patch for a bug that occurs
  with BCM43142 and possibly other broadcom chipsets that will look like
  random disconnects, poor wifi signal and kernel warnings, See also
  #1379524.

  Adding the patch is a fairly simple process:

  * put the patch file in /usr/src/bcmwl-6.30.223.248+bdcom/patches
  * add the following line to  /usr/src/bcmwl-6.30.223.248+bdcom/dkms.conf
  PATCH[7]="0014-null-pointer-crash.patch"
  * run: /usr/lib/dkms/common.postinst bcmwl 6.30.223.248+bdcom /usr/share/bcmwl x86_64 $(uname -r)

  This has fixed the issue for me. Edit: I just wanted to add that I did
  not write the patch; I merely downloaded it from a paste that was
  linked from the respective AUR package.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu1 [modified: usr/src/bcmwl-6.30.223.248+bdcom/dkms.conf]
  ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2
  Uname: Linux 3.16.0-29-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu8.1
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Thu Jan 29 13:15:17 2015
  InstallationDate: Installed on 2015-01-26 (3 days ago)
  InstallationMedia: Lubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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