Comment 41 for bug 1393744

In 2017

It seams there's some problem with network-manager and also power management in the driver.

Workaround:

Don't use network-manager. I'm using trinity, with out network-manager.

I also deactivated power management for wifi, and it works correctly.

sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

change "wifi.powersave = 3" to "wifi.powersave = 2"

don't forget to save :P

.... then restart the network, or just reboot.