Comment 18 for bug 1160188

Also have the problem... The reception is horrible and works fine in windows.
from dmesg:
[ 220.903488] WARNING: at /build/buildd/linux-3.8.0/drivers/net/wireless/ath/ath9k/hw.c:794 ar9003_get_pll_sqsum_dvc+0xb6/0xc0 [ath9k_hw]()
[ 220.903492] Hardware name: UX31E
[ 220.903495] Modules linked in: usb_storage(F) ip6table_filter(F) ip6_tables(F) ebtable_nat(F) ebtables(F) snd_hrtimer(F) ipt_MASQUERADE(F) iptable_nat(F) nf_nat_ipv4(F) nf_nat(F) nf_conntrack_ipv4(F) nf_defrag_ipv4(F) xt_state(F) nf_conntrack(F) ipt_REJECT(F) xt_CHECKSUM(F) iptable_mangle(F) xt_tcpudp(F) iptable_filter(F) ip_tables(F) x_tables(F) bridge(F) stp(F) llc(F) joydev(F) dm_crypt(F) parport_pc(F) ppdev(F) rfcomm bnep kvm_intel kvm asus_nb_wmi asus_wmi sparse_keymap snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep(F) rts5139(C) snd_pcm(F) snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) snd_rawmidi(F) snd_seq(F) uvcvideo videobuf2_vmalloc arc4(F) videobuf2_memops videobuf2_core videodev ath9k ath9k_common ath9k_hw snd_seq_device(F) snd_timer(F) ath mac80211 mac_hid microcode(F) snd(F) coretemp cfg80211 ath3k mei btusb soundcore(F) lp(F) parport(F) bluetooth psmouse(F) serio_raw(F) lpc_ich ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F) cryptd(F) wmi i915 video(F) i2c_algo_bit drm_kms_helper ahci(F) libahci(F) drm
[ 220.903633] Pid: 214, comm: kworker/u:5 Tainted: GF C 3.8.0-21-generic #32-Ubuntu
[ 220.903637] Call Trace:
[ 220.903650] [<ffffffff810587ef>] warn_slowpath_common+0x7f/0xc0
[ 220.903658] [<ffffffff8105884a>] warn_slowpath_null+0x1a/0x20
[ 220.903676] [<ffffffffa038e9a6>] ar9003_get_pll_sqsum_dvc+0xb6/0xc0 [ath9k_hw]
[ 220.903693] [<ffffffffa03fe2e3>] ath_hw_pll_work+0x53/0xd0 [ath9k]
[ 220.903702] [<ffffffff8107676c>] process_one_work+0x15c/0x4d0
[ 220.903710] [<ffffffff81077fce>] worker_thread+0x16e/0x480
[ 220.903718] [<ffffffff81077e60>] ? manage_workers+0x2a0/0x2a0
[ 220.903725] [<ffffffff8107d300>] kthread+0xc0/0xd0
[ 220.903732] [<ffffffff8107d240>] ? kthread_create_on_node+0x120/0x120
[ 220.903742] [<ffffffff816d372c>] ret_from_fork+0x7c/0xb0
[ 220.903748] [<ffffffff8107d240>] ? kthread_create_on_node+0x120/0x120
[ 220.903753] ---[ end trace 7faecf033a2db336 ]---
[ 220.903758] ath: phy0: PLL4 meaurement not done
[ 221.015326] ath: phy0: PLL4 meaurement not done
[ 221.127122] ath: phy0: PLL4 meaurement not done
[ 221.239037] ath: phy0: PLL4 meaurement not done
[ 221.350902] ath: phy0: PLL4 meaurement not done