Ok. I assume you mean you are connecting into Ubuntu via a network cable and then want to use your wireless card to serve internet to other devices, sounds like you dont have a wireless router. This can actually be done pretty easily, not sure about other versions, but definitely in 14.04 and 14.10.
Disable WIFI and plug in an internet cable to your laptop so that your Ubuntu is connect to a wired internet and wireless is disabled.
Go to Network Icon on top panel -> Edit Connections …, then click the Add button in the pop-up window.
Choose Wi-Fi from the drop-down menu when you’re asked to choose a connection type
In next window
Type in a connection name. The name will be used later. We will call it hotspot as example.
Type in a SSID
Select mode: Infrastructure
Device MAC address: select your wireless card from drop-down menu.
Go to Wi-Fi Security tab, select security type WPA & WPA2 Personal and set a password.
Go to IPv4 Settings tab, from Method drop-down box select Shared to other computers.
When done, click the save button.
After above steps, a configuration file was created under /etc/NetworkManager/system-connections directory. File name is same to the connection name you typed in step 4.
Now press Ctrl+Alt+T on keyboard to open terminal. When it opens, paste the commands below and hit enter to edit the configuration file:
Replace hotspot with the connection name you actually used
When the file opens, find the line
and change it to
Finally save the file.
When everything’s done, enable WIFI from Network Manager icon on the panel. It should automatically connect to the hotspot you created. If not, select “Connect to Hidden Wi-Fi Network …” and select it from the drop-down box.
You can now connect any other device via wireless, but the Ubuntu machine will need to keep it's wired connection.
Edit:I just seen you say your card does not support ap, so this probably will not work.
Works for me on my broadcom though