I can raise a new issue if appropriate but I believe I am having the
same / very similar issue.  With a Dell Vostro 3750.

user@s3750:~$ sudo rfkill list
[sudo] password for user: 
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: yes

This machine does not have a hard switch.  I can use a 'fn + wireless'
key combination to block all and from then I seem to be able to execute
a 'sudo rfkill unblock all'

user@s3750:~$ uname -a
Linux s3750 3.5.0-19-generic #30-Ubuntu SMP Tue Nov 13 17:48:01 UTC 2012 x86_64 
x86_64 x86_64 GNU/Linux

user@s3750:~$ sudo lshw -C network
[sudo] password for user: 
PCI (sysfs)  
  *-network               
       description: Wireless interface
       product: AR9285 Wireless Network Adapter (PCI-Express)
       vendor: Atheros Communications Inc.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlan0
       version: 01
       serial: e4:d5:3d:9d:ec:8f
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical 
wireless
       configuration: broadcast=yes driver=ath9k driverversion=3.5.0-19-generic 
firmware=N/A ip=192.168.1.134 latency=0 link=yes multicast=yes wireless=IEEE 
802.11bgn
       resources: irq:16 memory:f2a00000-f2a0ffff


user@s3750:~$ sudo lsmod
Module                  Size  Used by
hid_generic            12493  0 
usbhid                 46947  0 
hid                   100366  2 hid_generic,usbhid
joydev                 17457  0 
snd_hda_codec_realtek    77876  1 
coretemp               13400  0 
kvm_intel             132759  0 
kvm                   414070  1 kvm_intel
dell_wmi               12681  0 
sparse_keymap          13890  1 dell_wmi
arc4                   12529  2 
dell_laptop            17369  0 
dcdbas                 14438  1 dell_laptop
snd_hda_intel          33491  3 
snd_hda_codec         134212  2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep              13602  1 snd_hda_codec
snd_pcm                96580  2 snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
snd_rawmidi            30512  1 snd_seq_midi
microcode              22803  0 
snd_seq_midi_event     14899  1 snd_seq_midi
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
uvcvideo               76749  0 
videobuf2_core         32851  1 uvcvideo
videodev              120309  2 uvcvideo,videobuf2_core
videobuf2_vmalloc      12860  1 uvcvideo
btusb                  22474  0 
psmouse                95552  0 
serio_raw              13215  0 
lpc_ich                17061  0 
videobuf2_memops       13368  1 videobuf2_vmalloc
ath9k                 131308  0 
mac80211              539908  1 ath9k
ath9k_common           14055  1 ath9k
ath9k_hw              395218  2 ath9k,ath9k_common
ath                    23827  3 ath9k,ath9k_common,ath9k_hw
snd                    78734  15 
snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
cfg80211              206566  3 ath9k,mac80211,ath
soundcore              15047  1 snd
snd_page_alloc         18484  2 snd_hda_intel,snd_pcm
mei                    40690  0 
parport_pc             32688  0 
ppdev                  17073  0 
rfcomm                 46619  12 
bnep                   18140  2 
bluetooth             209199  22 btusb,rfcomm,bnep
mac_hid                13205  0 
lp                     17759  0 
parport                46345  3 parport_pc,ppdev,lp
ext2                   72880  1 
xts                    12880  8 
gf128mul               14951  1 xts
dm_crypt               23011  2 
vesafb                 13797  0 
nouveau               895609  1 
ttm                    83595  1 nouveau
ghash_clmulni_intel    13180  0 
aesni_intel            51037  340 
cryptd                 20403  18 ghash_clmulni_intel,aesni_intel
aes_x86_64             17208  1 aesni_intel
i915                  520629  3 
drm_kms_helper         46784  2 nouveau,i915
drm                   275528  7 nouveau,ttm,i915,drm_kms_helper
r8169                  61650  0 
i2c_algo_bit           13413  2 nouveau,i915
mxm_wmi                12979  1 nouveau
wmi                    19070  3 dell_wmi,nouveau,mxm_wmi
video                  19335  2 nouveau,i915

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https://bugs.launchpad.net/bugs/1038626

Title:
  After suspend or reboot Airplane Mode is on -- Atheros AR9285 ath9k

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