[ath9k-devel] Weird Atheros 9485 http connecting problems

[Arkh4mKn1ght <arkh4mkn1ght@gmail.com>]

Hello

I'm having a problem for some time with an atheros card 9485 using the 
ath9k driver. My computer has linux kernel 3.12.13 and i'm using ath9k 
driver from backports 3.15.

The problem that i have is that after some hours of using the computer, 
the wireless connection starts
to give problems only with HTTP and HTTPS connections. If i try to load 
a page it just stays in "connecting..." but after some minutes its does 
load the pages albeit slowly. Its weird because pings work fine, SSH 
access to external servers is also fine. I thought that it could be a 
DNS thing but if i try to load an http address by IP it also stalls in 
connecting....(although i can ping or ssh a external machine by domain 
without issues)
This problem happens with both GUI browsers and console browsers like 
lynx. The only way to
resolve this is to reboot the computer or power it off. I have also 
noticed that if i disable the network connection to my wireless router 
when the problem appears and connect to my smartphone with hotspot 
tethering im able to load web pages fine again, but as soon as i revert 
to my wireless router the problem resumes until i reboot or power off 
the computer. Also i dont use any kind of firewall.
My wireless router is a TP-LINK WR542G. Other machines connected to it 
dont experience any problems.

[root at localhost parameters]# iwconfig wlan0
wlan0     IEEE 802.11bgn  ESSID:"TP-LINK_E6342E"
           Mode:Managed  Frequency:2.462 GHz  Access Point: 
00:21:27:E6:34:2E
           Bit Rate=48 Mb/s   Tx-Power=16 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Encryption key:off
           Power Management:off
           Link Quality=61/70  Signal level=-49 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:85  Invalid misc:7145   Missed beacon:0

[root at localhost parameters]#

power management is off:
[root at localhost parameters]# iw dev wlan0 get power_save
Power save: off
[root at localhost parameters]#

[root at localhost parameters]# dmesg | grep -i ather
[    2.619076] usb 1-1.2: Manufacturer: Atheros Communications
[   17.326534] ieee80211 phy0: Atheros AR9485 Rev:1 
mem=0xffffc90004900000, irq=11
[root at localhost parameters]#

Any ideas of what could be wrong?

Greetings
Oskar