Hello Everyone,

Please lend me a hand here. I have made a clean install of Ubuntu
Jaunty a few months ago, and suddenly the wireless stopped working.
Even without any WPA or other encryption / authentication, my laptop
lacks to connect to my router. My wireless is Atheros 5005G, which is
identified as AR2413 802.11bg NIC by "lshw -C network", and my laptop
is a Toshiba Amilo Pa 1510. The router is fine, because other boxes
can connect to it. I recently made a fresh install of Karmik Koala,
which is already with the 2.6.31 kernel version, hoping that it was a
kernel bug, and it got fixed. No luck in that direction. I have
attached some outputs. I hope those are useful. I have also noticed,
that if I put my laptop right next to the router, then I get DHCP. If
I move further away, the connection is lost.

Any ideas what I could do to fix this?
eth0      Link encap:Ethernet  HWaddr 00:03:0d:5b:fb:b1  
          inet addr:192.168.2.100  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::203:dff:fe5b:fbb1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:31765 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20303 errors:0 dropped:0 overruns:0 carrier:0
          collisions:4 txqueuelen:1000 
          RX bytes:46662739 (46.6 MB)  TX bytes:1721852 (1.7 MB)
          Interrupt:21 Base address:0xa000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:28 errors:0 dropped:0 overruns:0 frame:0
          TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2016 (2.0 KB)  TX bytes:2016 (2.0 KB)

wlan0     Link encap:Ethernet  HWaddr 00:c0:a8:ce:76:a8  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wmaster0  Link encap:UNSPEC  HWaddr 
00-C0-A8-CE-76-A8-00-00-00-00-00-00-00-00-00-00  
          UP RUNNING  MTU:0  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0     IEEE 802.11bg  ESSID:"BitWise"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: Not-Associated   
          Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

  *-network:0
       description: Wireless interface
       product: AR2413 802.11bg NIC
       vendor: Atheros Communications Inc.
       physical id: 3
       bus info: p...@0000:05:03.0
       logical name: wmaster0
       version: 01
       serial: 00:c0:a8:ce:76:a8
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master cap_list logical ethernet physical wireless
       configuration: broadcast=yes driver=ath5k latency=168 maxlatency=28 
mingnt=10 module=ath5k multicast=yes wireless=IEEE 802.11bg
  *-network:1
       description: Ethernet interface
       product: RTL-8139/8139C/8139C+
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 5
       bus info: p...@0000:05:05.0
       logical name: eth0
       version: 10
       serial: 00:03:0d:5b:fb:b1
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master cap_list ethernet physical
       configuration: broadcast=yes driver=8139too driverversion=0.9.28 
ip=192.168.2.100 latency=64 maxlatency=64 mingnt=32 module=8139too multicast=yes
Linux karmic-dev 2.6.31-3-generic #19-Ubuntu SMP Tue Jul 14 16:07:02 UTC 2009 
x86_64 GNU/Linux
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