Network disconnect issues after updates.

[eddieg538]

Todays updates are causing disconnect issues for me. libnss3, libnspr4-0d, libnspr4, libnss-1d was upgraded. How or can I downgrade these?

[eddieg538]

Doesn't anyone know how to help? I can't have my computer to keep disconnecting me.

[SteveRiley]

Wired or wireless? Brand and model of adapters? Which drivers are in use? Anything in the syslog?

It's difficult to recommend where to begin looking for solutions when we don't know what you have.

[eddieg538]

Wireless. Its an intel card 4965agn. Where is the syslog? It was fine until the updates in my 1st post.

[SteveRiley]

Please show the output of

sudo lshw -C net

to provide more details, including driver, about your network adapters.

The "syslog" is the file /var/log/syslog. There might be useful information. Next time your wireless disconnects, please do whatever you do to reconnect it and then attach a copy of the syslog file to a reply here. I'd like to take a look.

[eddieg538]

here is the output...

*-network
description: Wireless interface
product: PRO/Wireless 4965 AG or AGN [Kedron] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0b:00.0
logical name: wlan0
version: 61
serial: 00:1f:3b:c7:d4:a3
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl4965 driverversion=3.2.0-58-generic-pae firmware=228.61.2.24 ip=192.168.1.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:46 memory:ecffe000-ecffffff
*-network
description: Ethernet interface
product: BCM4401-B0 100Base-TX
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 02
serial: 00:19:b9:63:8c:05
size: 10Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=half latency=64 link=no multicast=yes port=twisted pair speed=10Mbit/s
resources: irq:17 memory:eccfe000-eccfffff

ok, when it disconnects I have to restart. Then I'll send the syslog.. Thank you.

[GreyGeek]

I had exactly the same problem when I was running 12.04. I had to plug in an eth cable to get a connection. That's wasn't a problem for me because my wifi is about two feet away from my computer. But, when I wanted to move my computer and still have a connection I couldn't.

For me, the problem was the kernel. I experimented with kernels until I got it working again, which required a kernel of version 3.9 or higher. I used the liquorice kernel from their PPA.
BUT, when Kubuntu 14.04 alpha was released I tried a LiveCD of it and my wifi worked, so I installed it and am using it now.

[eddieg538]

Ok. I had to restart my internet modem/router and my machine has not disconnected once. Why would this be so? What do drivers on my machine have to do with my modem/router?

[SteveRiley]

Ok. I had to restart my internet modem/router and my machine has not disconnected once. Why would this be so?

Consumer networking gear is super cheap, has buggy software, and is basically unreliable. The networking stack can get buggered up with bad data in the queues, buffers that won't empty, out-of-order state machines, all kinds of weird crap. Rebooting makes this go away, at least for a while.

What do drivers on my machine have to do with my modem/router?

Drivers control how your network adapters create datagrams and communicate with peers. There are edge cases in which changing the way a client machine behaves can improve how it interacts with upstream devices. As an example, see the article I wrote about changing a TCP parameter in Windows Vista to make it cooperate better with hotel routers.

[eddieg538]

Oh I see. So it's actually a good idea to restart your modem/router occasionally. I'll mark this as solved. Thanks Steve!!