I just cretaed a dual boot Windows/Ubuntu. My Wifi works properly in windows, but it does not let me go on the Internet when in Ubuntu. DHCP seems to work since I apparently received a address that btw is the only one I can ping. I can neither ping the router address (that is I had a look at some config file, and I can see the wlan with iwconfig, but in the /etc/network/interfaces file there is nothing but

auto lo 
iface lo inet loopback

It seems strange to me (but yes, maybe is because I'm just a developer ) not seeing anything about wlan0.

What can be the problem?

wifi card adater is D-LINK N 150 Micro USB Adaper DWA 121

Ubuntu version 12.04 LTS

Chip on the pen is RTL8188

EDIT as per @innerand suugestion i downloaded from another computer the backport, but trying to install I've got a dependency not found:

[sudo] password for fpollano: 
Selecting previously unselected package linux-backports-modules-cw-3.6-3.2.0-56-generic:i386.
(Reading database ... 140014 files and directories currently installed.)
Unpacking linux-backports-modules-cw-3.6-3.2.0-56-generic:i386 (from linux-backports-modules-cw-3.6-3.2.0-56-generic_3.2.0-56.45_i386.deb) ...
dpkg: dependency problems prevent configuration of linux-backports-modules-cw-3.6-3.2.0-56-generic:i386:
 linux-backports-modules-cw-3.6-3.2.0-56-generic:i386 depends on linux-image-3.2.0-56-generic.
dpkg: error processing linux-backports-modules-cw-3.6-3.2.0-56-generic:i386 (--install):
 dependency problems - leaving unconfigured
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-3.8.0-29-generic
Warning: No support for locale: en_GB.utf8
Errors were encountered while processing:

No idea on how to find what is missing


There is a driver problem with this wifi-adapter (Chipset: Realtek RTL8188CUS).

See How to install driver for RTL8188CUS Wireless adaptor?

Probably solution:

sudo apt-get install linux-backports-modules-cw-3.6-precise-generic
  • is it possible to install the backport without internet? Which file are needed? – Felice Pollano Nov 24 '13 at 16:10
  • You can download the package from here link and install it manually (just double click the deb-file on your system). – innerand Nov 24 '13 at 21:42
  • I did but it miss some dependencies :( – Felice Pollano Nov 25 '13 at 8:03
  • Looks like a kernel missmatch. Find out your Kernel-version with 'uname -r' and search for the matching packet (on the right side of the linked page you find Similar Packages for different kernel-versions) -- or find internet over ethernet and use apt-get on your machine ;) – innerand Nov 25 '13 at 21:50
  • I'm trying I manage to share my win7 notebook wired connection with ubuntu. PAckages to choose via apt-get anyway are still a mess – Felice Pollano Nov 26 '13 at 10:42

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