Comment 77 for bug 1239578

It's possible that slaggish changing website is just my biasd impression and not really there.

Another symptom: Even after a sucessful connection to my wifi network, fairly often the instant messenages I sent on Facebook fail to send (possibly 1 out of 100), and the messages sometimes arrive out of order. It may be another indication of frequente packet drops with the current driver.

On the other hand, I don't think it's the timeout counter issue, because six months ago I had almost the same setup on a different laptop with a different wifi card/driver , and I never had this frequent disconnection issue. I was also using Network Manager on Ubuntu (13.10 back then), and the connection was perfect on my WPA2 network. Unless the default networking configuration has changed drastically in Ubuntu 14.04 (which I'm using), it's must be the driver issue. (And I have perfect connection on Windows with my T440s, so my new network card is not defective).