We get the same issue with 7962s and Chrome OS. They are able to connect to 7363s with no issues. I have updated the FW to 188.8.131.52 build 267 with no change. Doesn't matter if it's Open authentication and no encryption or if its Open with encryption. Doesn't matter. I have a case open with Ruckus right now and I have provided them some debug information. Hopefully we find a fix soon.