I have an Acer Aspire 6930 with an Intel 5100 WiFi chip set. The wireless worked in Windows 7, but my wife has an unparalleled mastery of finding malware in Windows, so to make things a bit easier on myself, I decided to set up Ubuntu for her.
Problem is, now the wireless is busted...wired network works flawlessly.
I can scan networks just fine, pick up all of them that I would expect to see in the neighborhood, but can't connect to anything.
Error message when trying to connect switches back and forth between "Bad Password" and "Can't obtain IP Address" errors. I've double checked the password is correct, still spits that error from time to time. Used another machine to setup an ad-hoc network, with no password, and it gives the "Can't obtain IP Address" error all the time when trying to connect to that.
The other interesting thing I noticed was that trying to enable the computer into an ad-hoc hot spot doesn't work either (Via System Settings >> Wireless >> Use as Hot Spot). It will show the hot spot information briefly, but as soon as I refresh my network list on another machine, to try to connect, the screen goes back to the default showing what network (none) I'm connected to.