The above command failed on my (stock) Dell XPS 13 Developer Edition, due to unmet dependencies.

However, after some great help from the folks on the #ubuntu-uk IRC channel, here's a solution that worked from my LX322x machine (fitted with the Atheros wireless card:

Open a terminal (press CTRL+ALT+T) and type:  sudo apt-get install linux-generic-lts-quantal

Then reboot your laptop.

This command installs a newer Linux kernel, with better drivers for the wifi card. I can confirm that all the other features (hotkeys, two finger scrolling etc.) all continue to work on this kernel.

Nothing to add here, just want to get notified if anyone replies with any tips. I have a Sputnik on the way, so want to be ready.

This may or may not be any help, but the firmware on the RT-N56U is very old. If you are able to update it, it may be worth trying to see if that resolves the issue. If it does it could provide a clue.

www.asus.com/.../RTN56U

Current version is: 3.0.0.4.360

I'm having similar issues.

I found a similar roaming entry in my syslog

Jul 12 22:45:42 sputnik NetworkManager[1120]: (wlan0): roamed from BSSID < > (blah network) to (none) ((none))
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): link timed out.
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): device state change: activated -> disconnected (reason 'supplicant-timeout') [100 30 11]
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): deactivating device (reason 'supplicant-timeout') [11]
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): canceled DHCP transaction, DHCP client pid 2108
Jul 12 22:45:53 sputnik kernel: [  231.979272] ADDRCONF(NETDEV_UP): wlan0: link is not ready
Jul 12 22:45:53 sputnik dnsmasq[2365]: exiting on receipt of SIGTERM

It looks to me that something seriously fails with my wifi. It then goes on to restart and go into a authenticate/deauthenticate loop until it eventually connects.

Jul 12 22:45:53 sputnik dbus[684]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Jul 12 22:45:53 sputnik NetworkManager[1120]: Auto-activating connection 'blah network'.
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) starting connection 'blah network'
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0/wireless): access point 'blah network' has security, but secrets are required.
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): device state change: config -> need-auth (reason 'none') [50 60 0]
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0/wireless): connection 'blah network' has security, and secrets exist.  No new secrets needed.
Jul 12 22:45:53 sputnik NetworkManager[1120]: Config: added 'ssid' value 'blah network'
Jul 12 22:45:53 sputnik NetworkManager[1120]: Config: added 'scan_ssid' value '1'
Jul 12 22:45:53 sputnik NetworkManager[1120]: Config: added 'key_mgmt' value 'WPA-PSK'
Jul 12 22:45:53 sputnik NetworkManager[1120]: Config: added 'auth_alg' value 'OPEN'
Jul 12 22:45:53 sputnik NetworkManager[1120]: Config: added 'psk' value ' '
Jul 12 22:45:53 sputnik NetworkManager[1120]: Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Jul 12 22:45:53 sputnik NetworkManager[1120]: Config: set interface ap_scan to 1
Jul 12 22:45:53 sputnik dbus[684]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jul 12 22:45:53 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: disconnected -> scanning
Jul 12 22:45:57 sputnik wpa_supplicant[1188]: Trying to authenticate with < > (SSID='blah network' freq=5220 MHz)
Jul 12 22:45:57 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: scanning -> authenticating
Jul 12 22:45:57 sputnik wpa_supplicant[1188]: Trying to associate with < > (SSID='blah network' freq=5220 MHz)
Jul 12 22:45:57 sputnik kernel: [  235.773684] wlan0: authenticate with < > (try 1)
Jul 12 22:45:57 sputnik kernel: [  235.774821] wlan0: authenticated
Jul 12 22:45:57 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: authenticating -> associating
Jul 12 22:45:57 sputnik kernel: [  235.787729] wlan0: associate with < > (try 1)
Jul 12 22:45:57 sputnik kernel: [  235.788982] wlan0: RX ReassocResp from < > (capab=0x11 status=12 aid=0)
Jul 12 22:45:57 sputnik kernel: [  235.788990] wlan0: < > denied association (code=12)
Jul 12 22:45:57 sputnik wpa_supplicant[1188]: CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=3
Jul 12 22:45:57 sputnik kernel: [  235.794142] wlan0: deauthenticating from < > by local choice (reason=3)
Jul 12 22:45:57 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: associating -> disconnected

Repeat authentications -> associating > disconnected another 10 times until...

Jul 12 22:46:40 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: associating -> associated
Jul 12 22:46:40 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: associated -> 4-way handshake
Jul 12 22:46:40 sputnik wpa_supplicant[1188]: WPA: Key negotiation completed with < > [PTK=CCMP GTK=TKIP]
Jul 12 22:46:40 sputnik wpa_supplicant[1188]: CTRL-EVENT-CONNECTED - Connection to < > completed (reauth) [id=0 id_str=]
Jul 12 22:46:40 sputnik NetworkManager[1120]: (wlan0): supplicant interface state: 4-way handshake -> completed
Jul 12 22:46:40 sputnik NetworkManager[1120]: Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'blah network'.

I received my XPS13 Developer Edition a few days ago. I have fully updated it.

Connecting to a Virgin Media "SuperHub"

I have the same problems. Looking for a solution.

Brand new XPS 13 with Ubuntu 13.04 connecting to a Vigin Media "SuperHub".

The connection drops randomly and often. I have to re-boot to reconnect. I'm a complete Linux novice so this is a learning curve!

Still seeing the same issues with both ma....

Dell have been and replaced the wireless card in one of the laptops to no avail.

Their next course of action is, and I quote, "an OS replacement, followed by a full refund if this fails to solve the issue"

The issue here is with multiple APs, not just this RT-N56U.

I have around 10 seperate devices connecting to the RT-N56U without any problems at all.

I just received my L322X Sputnik and have also been experiencing the drops on my Asus RT-N66U, a Verizon 4G LTE router and NAC wifi routers at work. The symptom, wifi tries to connect and eventually asks for the passphrase again. The process continues to repeat.

I'm running an up to date 13.04

Just now I turned off Bluetooth and Wifi connected, so perhaps that's a workaround?

I'm a little confused about the wifi card that's installed. The Sputnik page says it ships with "Intel® Centrino® Advanced-N 6230 802.11 a/g/n" however, the card in the laptop is an "Atheros AR9462"

           *-network
                description: Wireless interface
                product: AR9462 Wireless Network Adapter
                vendor: Atheros Communications Inc.
                physical id: 0
                bus info: pci@0000:01:00.0
                logical name: wlan0
                version: 01
                serial: bc:85:56:XX:XX:XX
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
                configuration: broadcast=yes driver=ath9k driverversion=3.8.0-19-generic firmware=N/A ip=10.0.1.145 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
                resources: irq:16 memory:d0400000-d047ffff memory:bfa00000-bfa0ffff

At any rate, I found another suggestion that I've not tried yet:

https://bugs.launchpad.net/linuxmint/+bug/1040943 and

http://www.unixmen.com/resolve-slow-connexion-when-using-wifi-in-ubuntu-1104-natty-narwhal/

The first suggestion:

sudo vi /etc/modprobe.d/ath9k.conf

append the file with:

options ath9k nohwcrypt=1

Reboot

we have had pretty solid wireless since upgrading to 13 and running update manager immediately...

we tried the nohwcrypt=1 within 12.04 and most others  fixes with no joy on 12.04

numerous calls with Dell ended up with them offering us the RedHat support number ?!?!?!?

words fail me.

Has anyone searched around on this wifi card?  I came across several links (on Arch Linux and Ubuntu forums).

See this thread on the Ubuntu forums:  http://ubuntuforums.org/showthread.php?t=2133296 they seem to have some success with a new driver.  Note that this was in April (about 3 mo ago).

It seems the Atheros AR9462 might be an issue with current drivers.  I haven't modified anything, but I am seeing similar problems with the overall performance of the wireless (particularly stopping mid-download and pausing, then picking up about 40 seconds later and finishing).  And this is being about 2-3 meters away from the AP.

Hi!

I have XPS L322X, with ubuntu and similar problems. When I installed

linux-backports-modules-cw-3.8-precise-generic

it's help a little. So jus "apt-get install linux-backports-modules-cw-3.8-precise-generic" and reboot. It will
install a new versio on of the ath9k module.