sudo rmmod ath9k

sudo modprobe ath9k nohwcrypt=1

gksudo gedit /etc/modprobe.d/ath9k.conf

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.10
DISTRIB_CODENAME=quantal
DISTRIB_DESCRIPTION="Ubuntu-Secure-Remix 12.10 19oct2012"

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 002: ID 04f2:b2e2 Chicony Electronics Co., Ltd 
Bus 003 Device 003: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:0139 Realtek Semiconductor Corp. Card reader

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 630M] (rev ff)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)

Module                  Size  Used by
bbswitch               13396  0 
bnep                   18140  2 
parport_pc             32688  0 
rfcomm                 46619  12 
snd_hda_codec_hdmi     32007  1 
ppdev                  17073  0 
snd_hda_codec_realtek    77876  1 
joydev                 17457  0 
snd_hda_intel          33491  3 
arc4                   12529  2 
snd_hda_codec         134212  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
ath9k                 131308  0 
mac80211              539908  1 ath9k
snd_hwdep              13602  1 snd_hda_codec
snd_pcm                96580  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
coretemp               13400  0 
i915                  520629  3 
ath9k_common           14055  1 ath9k
snd_rawmidi            30512  1 snd_seq_midi
drm_kms_helper         46784  1 i915
btusb                  22474  0 
snd_seq_midi_event     14899  1 snd_seq_midi
drm                   275528  4 i915,drm_kms_helper
kvm                   414070  0 
ath9k_hw              395218  2 ath9k,ath9k_common
bluetooth             209199  22 bnep,rfcomm,btusb
lp                     17759  0 
ath                    23827  3 ath9k,ath9k_common,ath9k_hw
i2c_algo_bit           13413  1 i915
mac_hid                13205  0 
snd_seq                61521  2 snd_seq_midi,snd_seq_midi_event
snd_timer              29425  2 snd_pcm,snd_seq
snd_seq_device         14497  3 snd_seq_midi,snd_rawmidi,snd_seq
mei                    40690  0 
uvcvideo               76749  0 
ghash_clmulni_intel    13180  0 
cryptd                 20403  1 ghash_clmulni_intel
psmouse                95552  0 
snd                    78734  16 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
videobuf2_core         32851  1 uvcvideo
soundcore              15047  1 snd
videodev              120309  2 uvcvideo,videobuf2_core
snd_page_alloc         18484  2 snd_hda_intel,snd_pcm
cfg80211              206566  3 ath9k,mac80211,ath
ideapad_laptop         18086  0 
microcode              22803  0 
videobuf2_vmalloc      12860  1 uvcvideo
rts5139               356158  0 
videobuf2_memops       13368  1 videobuf2_vmalloc
parport                46345  3 parport_pc,ppdev,lp
video                  19335  1 i915
serio_raw              13215  0 
lpc_ich                17061  0 
wmi                    19070  0 
sparse_keymap          13890  1 ideapad_laptop
r8169                  61650  0

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"freewifi_nours"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: F4:CA:E5:B7:F3:70   
          Bit Rate=121.5 Mb/s   Tx-Power=16 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=57/70  Signal level=-53 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:12  Invalid misc:212   Missed beacon:0

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback