Public bug reported:

I have a Dell XPS 13 9350 with a Broadcom wifi adapter. Wifi connects
fine, but dies for around 5-10s (the signal dies completely, tools like
wavemon show "no interface data") in regular cycles of about 60s. dmesg
logs the same brcmfmac errors every minute or so: "brcmfmac:
brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)".

network-manager's icon doesn't change however (remains as if the adapter
was connected).

This issue started to affect me when using kernel 4.8 on Ubuntu 16.04. I
previously used kernel 4.7 and did not experience this bug.

I booted the 16.10 daily build and experienced exactly the same errors.

$ lspci | grep BCM4350
3a:00.0 Network controller: Broadcom Limited BCM4350 802.11ac Wireless Network 
Adapter (rev 08)

$ dmesg | grep brcm
[    5.864558] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Oct 22 
2015 06:16:26 version 7.35.180.119 (r594535) FWID 01-e791c176
[    5.898803] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 
0x30)
[   74.991987] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 
0x30)
[  142.503220] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 
0x30)
...

$ lsb_release -rd
Description:    Ubuntu 16.04.1 LTS
Release:        16.04

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.1.93-0ubuntu4
Uname: Linux 4.8.0-040800-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Oct  4 14:15:02 2016
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2016-05-26 (131 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IpRoute:
 default via 192.168.0.1 dev wlp58s0  proto static  metric 600 
 169.254.0.0/16 dev wlp58s0  scope link  metric 1000 
 192.168.0.0/24 dev wlp58s0  proto kernel  scope link  src 192.168.0.29  metric 
600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE   TYPE      STATE      DBUS-PATH                                  
CONNECTION     CON-UUID                              CON-PATH                   
                        
 wlp58s0  wifi      connected  /org/freedesktop/NetworkManager/Devices/0  Guava 
Guest 1  68ae8dc2-ab23-42ef-9e41-ac8e9d91385a  
/org/freedesktop/NetworkManager/ActiveConnection/0 
 lo       loopback  unmanaged  /org/freedesktop/NetworkManager/Devices/1  --    
         --                                    --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: 
Error: Object 'nm' is unknown, try 'nmcli help'.

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Summary changed:

- wifi connection dies intermittently in 60s cycles
+ Broadcom wifi dies in 60s cycles with 4.8 kernel

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1630324

Title:
  Broadcom wifi dies in 60s cycles with 4.8 kernel

Status in network-manager package in Ubuntu:
  New

Bug description:
  I have a Dell XPS 13 9350 with a Broadcom wifi adapter. Wifi connects
  fine, but dies for around 5-10s (the signal dies completely, tools
  like wavemon show "no interface data") in regular cycles of about 60s.
  dmesg logs the same brcmfmac errors every minute or so: "brcmfmac:
  brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)".

  network-manager's icon doesn't change however (remains as if the
  adapter was connected).

  This issue started to affect me when using kernel 4.8 on Ubuntu 16.04.
  I previously used kernel 4.7 and did not experience this bug.

  I booted the 16.10 daily build and experienced exactly the same
  errors.

  $ lspci | grep BCM4350
  3a:00.0 Network controller: Broadcom Limited BCM4350 802.11ac Wireless 
Network Adapter (rev 08)

  $ dmesg | grep brcm
  [    5.864558] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Oct 
22 2015 06:16:26 version 7.35.180.119 (r594535) FWID 01-e791c176
  [    5.898803] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
  [   74.991987] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
  [  142.503220] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
  ...

  $ lsb_release -rd
  Description:  Ubuntu 16.04.1 LTS
  Release:      16.04

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: network-manager 1.1.93-0ubuntu4
  Uname: Linux 4.8.0-040800-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Oct  4 14:15:02 2016
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2016-05-26 (131 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  IpRoute:
   default via 192.168.0.1 dev wlp58s0  proto static  metric 600 
   169.254.0.0/16 dev wlp58s0  scope link  metric 1000 
   192.168.0.0/24 dev wlp58s0  proto kernel  scope link  src 192.168.0.29  
metric 600
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-dev:
   DEVICE   TYPE      STATE      DBUS-PATH                                  
CONNECTION     CON-UUID                              CON-PATH                   
                        
   wlp58s0  wifi      connected  /org/freedesktop/NetworkManager/Devices/0  
Guava Guest 1  68ae8dc2-ab23-42ef-9e41-ac8e9d91385a  
/org/freedesktop/NetworkManager/ActiveConnection/0 
   lo       loopback  unmanaged  /org/freedesktop/NetworkManager/Devices/1  --  
           --                                    --
  nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 
2: Error: Object 'nm' is unknown, try 'nmcli help'.

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