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ziro360

Member

Registered: 2012-04-27

Posts: 30

Ath9k and 802.11n

Hi guys, just upgraded my house connection to 200mb/s and encountered a problem with my main laptop, an asus n550jv. It as a 802.11n capable card but for some reason can't get a speed more than 50mb/s.

iwconfig

wlp4s0    IEEE 802.11bgn  ESSID:"Vodafone-FAE0BA"  
          Mode:Managed  Frequency:2.427 GHz  Access Point: FC:E3:3C:FA:E0:C0   
          Bit Rate=65 Mb/s   Tx-Power=14 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr: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:0  Invalid misc:30   Missed beacon:0

lspci -nn | grep Atheros                                                                                                                                                                                                               ⏎

04:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01)

lsmod | grep ath9k

ath9k                 131072  0
ath9k_common           32768  1 ath9k
ath9k_hw              438272  2 ath9k_common,ath9k
ath                    28672  3 ath9k_common,ath9k,ath9k_hw

and i have added to /etc/modprobe.d/ath9k.conf

options ath9k nohwcrypt=1

Any ideas?

Last edited by ziro360 (2015-10-15 16:05:04)

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: Ath9k and 802.11n

> just upgraded my house connection to 200mb/s
Access point? Any special settings for broader channels / more bandwidth?

> can't get a speed more than 50mb/s
'iwconfig' directly below states "Bit Rate=65 Mb/s".

What are the effective (pacman/wget/browser/torrent/...)  download rates in MB(ytes) per second?
Do other 2.4GHz devices get more speed out of the network?
I'd consider anything above 5 MB/s in a 2.4GHz band already very good.

---

1000

ziro360

Member

Registered: 2012-04-27

Posts: 30

Re: Ath9k and 802.11n

> Access point? Any special settings for broader channels / more bandwidth?
Yes, switched to fiber optics.

> 'iwconfig' directly below states "Bit Rate=65 Mb/s".
Its between 50~70 Mb/s at the moment, but if I boot to Window i can get up to 150Mb/s same as my wife macbook. And if i connect to the router by ethernet it goes all the way to 200Mb/s.

> What are the effective (pacman/wget/browser/torrent/...)  download rates in MB(ytes) per second?

wget http://releases.ubuntu.com/vivid/ubuntu-15.04-desktop-amd64.iso

ubuntu-15.04-desktop-amd64.iso                                4%[=====>                                                                                                                                       ]  54.32M  3.44MB/s   eta 4m 58s

> I'd consider anything above 5 MB/s in a 2.4GHz band already very good
Since i only get ~50Mb/s i assume the cart is locked on 802.11g instead of 802.11n.

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: Ath9k and 802.11n

> fiber optics
I asked about the access point / the wifi infrastructure.
What's the used channel and have you checked on external factors like frequency pollution and other networks in the neighbourhood with a wifi analyzer tool?

> locked on 802.11g
It's n, else iwconfig wouldn't display anything higher than 54Mb/s.

---

1000

ziro360

Member

Registered: 2012-04-27

Posts: 30

Re: Ath9k and 802.11n

>
What's the used channel and have you checked on external factors like frequency pollution and other networks in the neighbourhood with a wifi analyzer tool?

With the same AP configurations and the same laptop on windows gets ~150mb/s. I don't think its a problem with the AP