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Yesterday I got my first Ubuntu (11.10 32 bit) installation (wish me luck), and I ran into a problem with my USB network card.

I use a wireless USB stick by edimax (it is called IEEE802.11b/g/n nano USB adapter or also EW-7811Un).

My problem is that Ubuntu seems to be able to use the USB to see the networks around me, but when I try to connect to my network - it just keeps trying and failing.

I am connected to the internet through a

300M Wireless N Router Model No. TL-WR841N / TL-WR841ND

I have other computers in the house which are able to connect to the internet. And the same computer previously had Windows on it - and it managed to connect to the internet with no problem.

Can you please advise on how this can be resolved? (what output should I send you?)

Thanks!

Tal Galili
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2 Answers2

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o.k., I solved the problem.

It took a bunch of steps - I have detailed them here:

http://www.r-statistics.com/2011/11/edimax-ew-7811un-usb-wireless-connecting-to-a-network-on-ubuntu-11-10/

Thank you Engels for your kind help! (I also gave credit in the post, and will gladly link to whatever website you might want from your name)

Tal Galili
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If you are using Edimax EW-7811Un then the following (qouted from this site) should fix the problem:

Create this file /etc/modprobe.d/8192cu.conf and and the following lines to it:

# Disable power management
options 8192cu rtw_power_mgnt=0 rtw_enusbss=0

Then save it and reboot and the wifi adapter should work properly.

For more details about the above parameters and their values:

rtw_power_mgnt=0|1|2
---------------------------------
    0 == disable power saving
    1 == power saving on, minPS
    2 == power saving on, maxPS

rtw_enusbss=0|1
---------------------------------
    0 == disable auto suspend
    1 == enable auto suspend
razzak
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