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View Full Version : [ubuntu] Atheros AR928X - Great on 10.10, bust on 11.04.



Roasted
May 2nd, 2011, 04:33 PM
I was doing some testing on my CR-48 notebook, which seemed to be very slow wirelessly when running Ubuntu 11.04. I cracked it open and decided to swap out the wireless cards with an Intel Wifi Link 1000 card I had in my other laptop, which is a Dell Latitude.

I then began to do some speed testing, using speedtest.net. I tested each laptop 5 times for each card, so I did 20 tests total.

5 - CR-48 - Intel
5 - CR-48 - Atheros
5 - Latitude - Intel
5 - Latitude - Atheros

The results I think speak for themselves. While the Atheros card no doubt *works*, it doesn't work as efficiently as the Intel card I tried. I also noticed if I shut off my wireless security, my speeds drastically improved on the Atheros card.

Note - on my router (WRT54G) I used both mixed mode, G-only mode, WPA, WPA2 and a mixture of TKIP, AES, and TKIP+AES encryption. My results were the same across the board unless I took off security.




Wireless Card Ping Download Upload
CR-48
Atheros AR928X 40 5.72 1.37
Atheros AR928X 40 4.55 16.45
Atheros AR928X 37 2.03 0.39
Atheros AR928X 36 1.94 15.95
Atheros AR928X 51 3.22 15.34

Dell E5500
Atheros AR928X 55 12.08 5.1
Atheros AR928X 54 2.46 3.77
Atheros AR928X 54 14.57 4.83
Atheros AR928X 54 1.97 3.43
Atheros AR928X 56 3.05 4.06

CR-48
Intel WiFi Link 1000 38 15.6 15.37
Intel WiFi Link 1000 38 14.57 15.04
Intel WiFi Link 1000 37 19.29 13.8
Intel WiFi Link 1000 36 22.45 14.73
Intel WiFi Link 1000 38 17.74 14.81

Dell E5500
Intel WiFi Link 1000 51 15.57 4.53
Intel WiFi Link 1000 53 16.06 5.02
Intel WiFi Link 1000 54 19.18 3.2
Intel WiFi Link 1000 54 16.37 4.8
Intel WiFi Link 1000 53 18.67 4.49

Has anybody noticed similar results on this Atheros card, or any other wireless card while we're on the topic? I plan on submitting a bug for this later today.

tblups
May 2nd, 2011, 06:00 PM
Yes, the same problem here with an Atheros AR2427. Very disappointing.