Actually, I have this problem on 11.04, 11.10 also(tried a lot but did not get it work, which forced me to get back to windows for a while. Now trying 12.04, the problem is still there!!)
@Tim Gardner (timg-tpi)
I tried 'apt-get install linux-backports-modules-cw-3.3-precise-generic' , not working.
I tried kernel 3.2.0-18 and 3.3.0-030300rc6, problem still there.
And also followed some suggestions to replace network-manager with wicd, still there.
network works great under windows without any problem
I got the same problem(Thinkpad T420)!!!
Actually, I have this problem on 11.04, 11.10 also(tried a lot but did not get it work, which forced me to get back to windows for a while. Now trying 12.04, the problem is still there!!)
@Tim Gardner (timg-tpi) -modules- cw-3.3- precise- generic' , not working.
I tried 'apt-get install linux-backports
I tried kernel 3.2.0-18 and 3.3.0-030300rc6, problem still there.
And also followed some suggestions to replace network-manager with wicd, still there.
network works great under windows without any problem