Broadcom wifi dies in 60s cycles with 4.8 kernel
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Fedora) |
Unknown
|
Unknown
|
|||
linux (Ubuntu) |
Confirmed
|
High
|
Unassigned |
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_
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_
[ 5.898803] brcmfmac: brcmf_cfg80211_
[ 74.991987] brcmfmac: brcmf_cfg80211_
[ 142.503220] brcmfmac: brcmf_cfg80211_
...
$ 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-
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.
[main]
NetworkingEnab
WirelessEnable
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/freedeskto
lo loopback unmanaged /org/freedeskto
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.
Changed in network-manager (Ubuntu): | |
importance: | Undecided → High |
affects: | network-manager (Ubuntu) → linux (Ubuntu) |
Status changed to 'Confirmed' because the bug affects multiple users.