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I recently bought a Sitecom Wireless Network Access Point 300N WL-331. It's very easy to install. I tested the connection by connecting from 2 different laptops running Windows 7 (everything went fine) , then I tried it with 2 android devices (again everything went fine).

Now it was time to try using the AP from Ubuntu 11.10. (One of the laptops run on dualboot). Since I boot into Ubuntu 95% of the time, it's essential that this works.

I tried connecting, it worked perfectly. All pages load fast, I did a speed test and I get 47mbps download (my ISP provides 50mbps so that's good)

Once I added some security to the AP (WEP key) some problems came up on my Ubuntu machine:

  • When I connect the first page displays fast ( but it keeps on loading
  • After that when I try loading ANY other page it takes ages... :(

If I reset the AP and leave it unprotected, everything is nice and fast. I also tried adding a WPA protection but the same problem keeps occurring.

EDIT: Wireless Card: Intel Link 5100

Anyone got an idea?

PS: After adding a protection, I tried again on the Windows machines + android devices and they run like they were running before so I'm guessing it's an Ubuntu issue.

Thanks in advance!

share|improve this question
plz add more information about your wireless card. – Bruno Pereira Nov 9 '11 at 11:02
Wireless card information added ;) – KennyDs Nov 9 '11 at 11:54

Edit the file (or create) /etc/modprobe.d/options.conf, add the line

options iwlagn 11n_disable=1


options iwlagn 11n_disable50=1

Try each and see which works for you.

Reboot for testing on each line you are testing

sudo reboot
share|improve this answer
Thanks, will try this when I get home and keep you updated. – KennyDs Nov 9 '11 at 12:01
perfect ;) anything, drop a comment. – Bruno Pereira Nov 9 '11 at 12:03
I just created the file as instructed and rebooted and now I don't even have the option to connect to a wireless network. Seems like my wireless has dissapeared. Any other ideas? Thx alot already :-) EDIT: I just left the "options iwlagn 11n_disable=1" in it and now it seems to be working ;). EDIT2: I just did a speedtest and I'm only getting half of my speed I should be getting. I tested it on my Windows OS and it was double the speed I have now on my Ubuntu machine. Any idea? – KennyDs Nov 9 '11 at 20:20
This disables N rate speeds in your wireless card so its normal that you do not have the same speeds as using the windows drivers, I think this is reported somewhere as a network-manager problem one of the solutions removes network-manager and installs wicd instead, might work for you but can also break (believe not but you never know) your system a bit. Drop a comment if you are interested in trying this. – Bruno Pereira Nov 9 '11 at 22:31
Sure I'm definitely interested in trying it out, any guidance? Already upvoted btw – KennyDs Nov 10 '11 at 6:46

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