Looks like a driver issue. I sanitized the instructions from several
sources, the person I was helping reported apparent initial success with
the Realtek driver built+installed manually:
1) Make sure the system is up to date and development tools are installed:
sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y
sudo apt-get install --reinstall build-essential
sudo apt-get install --reinstall linux-headers-generic
sudo apt-get install --reinstall linux-headers-`uname -r`
2) Get the appropriate driver file from realtek.com. Its name will end
with .tar.gz. The model you are looking for is RTL8191SE (NOT VA2).
3) Open a terminal, go to the folder where the file was saved:
$ cd Downloads
4) Uncompress the file:
$ tar -xvzf 92ce_se_de_linux_mac80211_0005.1230.2011.tar.gz
5) Change to the directory
$cd rtl_92ce_92se_92de_linux_mac80211_0005.1230.2011
6) Build & install
1. Change to Super User
$ sudo -s
2. Compile driver from the source code , install it to the kernel
# make && make install
3. Reboot:
# reboot
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1000208
Title:
wifi network get disconnected periodically -- Realtek RTL8191SEvA
Status in “network-manager” package in Ubuntu:
Incomplete
Bug description:
I found a few similar bugs in launchpad history but they are at least
3-4 years old, and I encounter this problem just after upgrade to
12.04!
I consulted a colleague who is a network expert, he suggested me to
stop using wireless mouse, adjusted router settings, such as changed
channels, added mac address binding, stopped ssid broadcasting, just
in case there are some hackers trying to attack my network, but to no
avail.
Their are still possibilities of hardware configuration, environment
issues or hackers around my house, but the most strange thing that
triggered me reporting this bug is that all my other devices like
windows laptop, android phones are all OK, only this Ubuntu laptop
having problem!
I also attach 2 files, one is the output of a ping command so that you
can see what happened (during the ping session I tried to let network
manager reconnect, even if it reconnected, the network is still not
pingable.
Another file is syslog about the network manager.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Wed May 16 20:47:46 2012
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
IpRoute:
default via 10.0.0.3 dev wlan0 proto static
10.0.0.0/24 dev wlan0 proto kernel scope link src 10.0.0.202 metric 2
169.254.0.0/16 dev wlan0 scope link metric 1000
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
NAME UUID TYPE
TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY
DBUS-PATH
Wired connection 1 1438463e-1c73-40f3-b17c-7e348b229da5
802-3-ethernet 1337172058 2012年05月16日 星期三 20时40分58秒 yes no
/org/freedesktop/NetworkManager/Settings/1
MINGYANG 3cba4065-6d37-46ff-b35b-1f94b2bae5ba
802-11-wireless 1337172358 2012年05月16日 星期三 20时45分58秒 yes no
/org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
wlan0 802-11-wireless connected
/org/freedesktop/NetworkManager/Devices/1
eth0 802-3-ethernet unavailable
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE
WIFI WWAN-HARDWARE WWAN
running 0.9.4.0 connected enabled enabled
enabled enabled disabled
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