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At random times, several time sper day after upgrade from 13.10 to 14.04, my
wireless connection gets disconnected and the system log shows:
May 2 13:17:01 Baba-Yaga CRON[18205]: (root) CMD ( cd / && run-parts
--report /etc/cron.hourly)
May 2 13:40:03 Baba-Yaga wpa_supplicant[1553]: wlan0: CTRL-EVENT-DISCONNECTED
bssid=d4:ca:6d:57:91:d1 reason=0
May 2 13:40:03 Baba-Yaga NetworkManager[1200]: <info> (wlan0): roamed from
BSSID D4:CA:6D:57:91:D1 (Host) to (none) ((none))
May 2 13:40:03 Baba-Yaga NetworkManager[1200]: <info> (wlan0): supplicant
interface state: completed -> disconnected
May 2 13:40:03 Baba-Yaga wpa_supplicant[1553]: wlan0: Reject scan trigger
since one is already pending
May 2 13:40:03 Baba-Yaga wpa_supplicant[1553]: wlan0: Failed to initiate AP
scan
At this point, I will never be able to reconnect to the access point and
after several attempts, the wirless connection is removed from the
NetworkManager applet and the only way to get the wirless connection
back, is to shut down the machine, turn it back on and let it boot. Just
doing a warm reboot will not resolve the issue in many cases. A cold
reboot always will.
This is a Realtek USB based WiFi device and I have used it now for a few
years without issues. Moving the WiFi device to a Windows PC shows that
it works as intended and is never disconnecting or losing connection in
any way.
lsusb shows:
Bus 001 Device 005: ID 0bda:8171 Realtek Semiconductor Corp. RTL8188SU 802.11n
WLAN Adapter
$ lsb_release -rd
Description: Ubuntu 14.04 LTS
Release: 14.04
$ uname -a
Linux Baba-Yaga 3.14.0-031400-generic #201403310035 SMP Mon Mar 31 04:36:23 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
Same issue is also present with the default 3.13 kernel.
$ apt-cache policy network-manager
network-manager:
Installed: 0.9.8.8-0ubuntu7
Candidate: 0.9.8.8-0ubuntu7
Version table:
*** 0.9.8.8-0ubuntu7 0
500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: network-manager 0.9.8.8-0ubuntu7
Uname: Linux 3.14.0-031400-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
Date: Fri May 2 14:04:32 2014
EcryptfsInUse: Yes
ExecutablePath: /usr/sbin/NetworkManager
InstallationDate: Installed on 2014-04-26 (5 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
IpRoute:
default via 192.168.100.1 dev wlan0 proto static
169.254.0.0/16 dev eth0 scope link metric 1000
169.254.136.0/24 dev eth0 proto kernel scope link src 169.254.136.2
192.168.100.0/24 dev wlan0 proto kernel scope link src 192.168.100.162
metric 9
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
TERM=linux
PATH=(custom, no user)
LANG=en_US.UTF-8
RfKill:
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
NAME UUID TYPE
TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY
DBUS-PATH
Suburban 069407c8-4892-4a35-ae60-67471e4b941c
802-11-wireless 1399053730 Fri 02 May 2014 02:02:10 PM EDT yes
no /org/freedesktop/NetworkManager/Settings/1
Auto Suburban 1 31b75b94-c201-404c-9b8a-38a3d63fd032
802-11-wireless 0 never yes
no /org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
eth0 802-3-ethernet unmanaged
/org/freedesktop/NetworkManager/Devices/1
wlan0 802-11-wireless connected
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI
WWAN-HARDWARE WWAN
running 0.9.8.8 connected enabled enabled
enabled enabled disabled
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug trusty
--
wlan0 gets disconnected randomly and can not reconnect
https://bugs.launchpad.net/bugs/1315470
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