I experience a some trouble with ad-hoc on my Ubuntu laptop (Ubuntu
12.04 x86_64).
When my smartphone (CyanogenMod 9) trying to connect with network it
stop on getting IP address. I also trying connect to ad-hoc from another
laptop with Windows 7 and I'm facing with the same trouble.
The following simple steps how I create ad-hoc on my laptop with Ubuntu
and trying to connect my smartphone:
1. In the Network-manager I click on Create New Wireless Network
2. Enter the Network Name, choosing Wireless Security WEP 128-bit and
enter the Key.
3. I turn on wi-fi on my smartphone and trying to connect with created
ad-hoc, but it stop on getting IP address.