Has this bug been fixed in Ubuntu 12.04?
** Summary changed:
- Network-manager silently disconnects frequently
+ NetworkManager frequently disconnects from Wi-Fi networks with multiple
access points; wicd doesn't -- Broadcom bcm4322 wl
** Changed in: network-manager (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/427102
Title:
NetworkManager frequently disconnects from Wi-Fi networks with
multiple access points; wicd doesn't -- Broadcom bcm4322 wl
Status in “network-manager” package in Ubuntu:
Incomplete
Bug description:
Binary package hint: network-manager
I've been having major issues under jaunty and karmic keeping a
wireless connection up for more than a couple minutes at a time.
Sometimes it'll go for hours, but then start acting up again.
I'm on a bcm4322 wireless chip with broadcom's wl driver. I frequently
lose wireless connectivity, and nm-applet doesn't indicate it. As far
as I can tell, this is always on a network with many access points,
one or two of which are clearly the closest ones.
I'm attaching a log (nm.log) of a successful connection, followed by
what appears to be a successful roaming event, followed by a failed
roam event. Throughout this process, even after the disconnection, nm-
applet indicates the network is available.
The system itself seems to be aware that it's lost its connection, as
the logs indicate. It seems like the network roams from one AP to
another, and gets disconnected, reconnects and authenticates, but
doesn't run dhcp. Then, if I manually try to reconnect (by re-
selecting the network in nm-applet, which already indicates it's
connected) it fails to connect. I've been running the following
command to "restart" networking:
sudo killall wpa_supplicant dhclient; sudo /etc/init.d/NetworkManager
stop; sudo rmmod wl; sudo modprobe wl; sudo /etc/init.d/NetworkManager
start.
Also attached is nm2.log, which indicates the result of the above,
namely another unsuccessful connection. After a 2nd attempt to connect
after that sudo command, the network usually connects properly again,
for at least a few minutes. This doesn't always occur.
One other thing I've often noticed about nm-applet when symptom occur:
often nm-applet will show a wireless access point with the same ESSID
as the one I'm trying to connect to, but with no authentication
/encrytion-required icon. Such an AP is never visible in the results
of "sudo iwlist scanning".
The results here are from ubuntu karmic, with network-manager
0.8~a~git.20090820t182116.cb60390-0ubuntu2, although again, I get the
same apparant behavior under jaunty.
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