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I'm having trouble connecting to some SonicWall routers in Ubuntu (but it sadly works fine in Windows). Oddly enough, it will occasionally connect and allow me to use the internet as usual, but it will often kick me off again within 10 minutes; I'm using the standard iwlwifi driver, but I have also tried others and they don't seem to work either. I also looked into using NDIS Wrapper and the proprietary Windows driver, but that complains that the "hardware is not present." What kind of debugging can I try? Is there a log file that might reveal the real problem? Perhaps a verbose mode I could turn on? The only error message I could procure was something like "failed to activate non active driver." Here's an example MAC address of a wireless router that I'm trying to connect to:

00:17:C5:A5:E8:DE

Here's the output of sudo lshw -class network (when connected to a different, working wifi network):

*-network
description: Wireless interface
product: Centrino Advanced-N 6205
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 34
serial: a0:88:b4:b5:b3:f0
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-41-generic firmware=18.168.6.1 ip=10.0.0.7
latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:46 memory:f2400000-f2401fff

Here is my wireless card info from lspci:

03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)

Besides speed, Windows has no problem with the routers; MacBooks seem to be better than Ubuntu but are still subject to disconnectivity. I've not had problems connecting to other routers in Ubuntu, so I was surprised when it simply failed to work. Since I've occasionally successfully connected with both a random mac address and my normal mac address, I'm almost positive that it's not mac address white listing or black listing. The frustrating part is not that it doesn't work, but that it works fine in Windows and not in Ubuntu. Could the problem be the number of routers with the same ESSID?

On a side note, I'm currently using an OS based off of Ubuntu 12.04 LTS and not a "vanilla" install, but I've also encountered the same problem with regular Ubuntu 12.04 and 12.10.

Has anyone at least encountered this before or know of a solution to the problem besides getting new routers?

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I think they might need new firmware. –  Vreality Dec 11 '13 at 2:14

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