Comment 7 for bug 1293569

Same here with a freshly installed Ubuntu 14.04 running kernel 3.13.0-24-generic #46-Ubuntu SMP
I am using this wireless card :
http://www.intel.com/content/www/us/en/wireless-products/dual-band-wireless-ac-7260-bluetooth.html

Right after installation, wifi was extremely slow (to the point where browsing the web was not possible).

I found a workaround that fixed the issue following the instructions given here:
http://zeroset.mnim.org/2014/04/22/unstable-wifi-connection-on-ubuntu-14-04-trusty-tahr-ctrl-event-disconnected-reason4-locally_generated1/