Public bug reported:

When trying to connect to almost any wireless network, it never connects, the 
indicator just keeps moving until it says Disconnected a minute or so later. 
This happens 100% of the time with all encryped networks, and 99% of the time 
with unencrypted networks. I have so far have not been able to connect to an 
encrypted network, only unencrypted after several tries.
The very rare case when it does actually manage to connect (this is usually 
after trying to connect for an hour or so, many times beforehand, switching 
on/off the wireless with the hardware switch), it actually stays connected 
until you manually disconnect, and is also quite stable (downloads and PPTP  
connections work with no problem).

Attached is a snippet of the old syslog from a few days ago when I was
trying to connect, the current syslog doesn't have any relevant info as
I am not near a wireless network currently. I will be in a position to
do further testing tomorrow, if needed.

The system is a netbook:
Acer Aspire one,
with Atheros AR5BXB63 wireless card
-----------------------------------------------------------------------------------
$ lsb_release -rd
Description:    Ubuntu 12.04.1 LTS
Release:        12.04
-----------------------------------------------------------------------------------
network-manager:
  Installed: 0.9.4.0-0ubuntu4.1
  Candidate: 0.9.4.0-0ubuntu4.1
  Version table:
 *** 0.9.4.0-0ubuntu4.1 0
        500 http://si.archive.ubuntu.com/ubuntu/ precise-updates/main i386 
Packages
        100 /var/lib/dpkg/status
     0.9.4.0-0ubuntu3 0
        500 http://si.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
-----------------------------------------------------------------------------------

$ modinfo ath5k

filename:       
/lib/modules/3.2.0-31-generic-pae/kernel/drivers/net/wireless/ath/ath5k/ath5k.ko
license:        Dual BSD/GPL
description:    Support for 5xxx series of Atheros 802.11 wireless LAN cards.
author:         Nick Kossifidis
author:         Jiri Slaby
srcversion:     FA2500C2D3C1A3B6094E37C
alias:          pci:v0000168Cd0000001Dsv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Csv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Bsv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000001Asv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000019sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000018sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000017sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000016sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000015sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000014sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00001014sv*sd*bc*sc*i*
alias:          pci:v000010B7d00000013sv*sd*bc*sc*i*
alias:          pci:v0000A727d00000013sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000013sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000012sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000011sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000007sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000207sv*sd*bc*sc*i*
depends:        mac80211,cfg80211,ath
intree:         Y
vermagic:       3.2.0-31-generic-pae SMP mod_unload modversions 686 
parm:           nohwcrypt:Disable hardware encryption. (bool)
parm:           all_channels:Expose all channels the device can use. (bool)
parm:           fastchanswitch:Enable fast channel switching for AR2413/AR5413 
radios. (bool)

------------------------------------------------------------------------------------
$ iwconfig
lo        no wireless extensions.

virbr0    no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:"Prospero632"
          Mode:Managed  Frequency:2.462 GHz  Access Point: 02:30:B4:0B:56:50
          Bit Rate=1 Mb/s   Tx-Power=20 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=13/70  Signal level=-97 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:1  Invalid misc:2   Missed beacon:0

eth0      no wireless extensions.
------------------------------------------------------------------------------------
$ lspci -v

(omitted irrelevant devices)

03:00.0 Ethernet controller: Atheros Communications Inc. AR242x / AR542x 
Wireless Network Adapter (PCI-Express) (rev 01)
        Subsystem: Foxconn International, Inc. Device e008
        Flags: bus master, fast devsel, latency 0, IRQ 18
        Memory at 55200000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [40] Power Management version 2
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
        Capabilities: [60] Express Legacy Endpoint, MSI 00
        Capabilities: [90] MSI-X: Enable- Count=1 Masked-
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel
        Kernel driver in use: ath5k
        Kernel modules: ath5k

-------------------------------------------------------------------------------------
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28
Uname: Linux 3.2.0-31-generic-pae i686
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Sun Oct  7 23:01:50 2012
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
IpRoute:
 default via 10.1.0.1 dev eth0  proto static
 10.1.0.0/24 dev eth0  proto kernel  scope link  src 10.1.0.200  metric 1
 169.254.0.0/16 dev eth0  scope link  metric 1000
 192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to precise on 2012-07-13 (86 days ago)
nmcli-dev:
 DEVICE     TYPE              STATE         DBUS-PATH
 wlan0      802-11-wireless   disconnected  
/org/freedesktop/NetworkManager/Devices/1
 eth0       802-3-ethernet    connected     
/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         enabled

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 precise

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https://bugs.launchpad.net/bugs/1063445

Title:
  Wireless not connecting, disconnecting

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