Finally, the ur054g driver was installed on ubuntu11.04, and wireless Internet access was successful.

1. Uninstall network-Manager

Sudo apt-Get remove network-Manager

2. Install wicd

Sudo apt-Get install wicd

3. Download The isl3887usb firmware and copy it to the/lib/firmware/directory (refer to the http://spring4960.blog.51cto.com/286593/525560)

Uname-a check that the kernel version is 2.6.38

Lsusb viewing product ID: 1435: 0427

: Http://wireless.kernel.org/en/users/Drivers/p54

Go to ingress.

During installation, wicd can find wireless information, but the password is incorrect if authentication fails.

4. Download compat-wireless and install it. Restart. Wicd can pass WPA authentication and obtain IP addresses.

: Http://linuxwireless.org/download/compat-wireless-2.6/

Tar-jxvf compat-wireless-2012-05-10.tar.bz2cd compat-wireless-2012-05-10make make install