Wifi stops working after a while

[Dima Ryazanov]

After a while - sometimes a few hours, sometimes a day - NetworkManager disconnects from Wifi and fails to reconnect. Disabling wifi and re-enabling it fixes the problem.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: network-manager 0.9.8.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.8.0-29.42-generic 3.8.13.5
Uname: Linux 3.8.0-29-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Tue Aug 20 13:20:47 2013
EcryptfsInUse: Yes
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2013-04-05 (137 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
IpRoute:
 172.16.73.0/24 dev vmnet8 proto kernel scope link src 172.16.73.1
 192.168.235.0/24 dev vmnet1 proto kernel scope link src 192.168.235.1
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to raring on 2013-04-12 (129 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless connecting (configuring) /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.8.0 connecting enabled enabled enabled enabled enabled

[SignedAdam (signedadam)]

solution/fix and its a permanent.

type in command line :

sudo modprobe ath5k nohwcrypt

sudo sh -c "echo 'options ath5k nohwcrypt' >/etc/modprobe.d/custom-wireless.conf"

[SignedAdam (signedadam)]

I got slow speeds after entering the fix for "Wifi cutting out" so I then entered the following codes to fix "the slow speeds"

$ sudo rmmod -f iwlagn

$ sudo modprobe iwlagn 11n_disable=1

$ sudo su

# echo "options iwlagn 11n_disable=1" >> /etc/modprobe.d/iwlagn-disable11n.conf

$ sudo su

# echo "#disable ipv6" >> /etc/sysctl.conf

# echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf

# echo "net.ipv6.conf.default.disable_ipv6 = 1" >> /etc/sysctl.conf

# echo "net.ipv6.conf.lo.disable_ipv6 = 1" >> /etc/sysctl.conf

enter the codes above to fix the slow speeds

[Bryan Quigley (bryanquigley)]

If this is a reproducible problem on a current release, this is probably a kernel issue. Can anyone still reproduce?

[Launchpad Janitor (janitor)]

[Expired for network-manager (Ubuntu) because there has been no activity for 60 days.]