IWLWIFI

• If you have problems connecting to networks in general or your link quality is very poor, try to disable 802.11n, and perhaps also enable software encryption:

• *Create|Modify:
  /etc/modprobe.d/iwlwifi.conf
  options iwlwifi 11n_disable=1
  options iwlwifi swcrypto=1
  

• If you have a problem with slow uplink speed in 802.11n mode, for example 20Mbps, try to enable antenna aggregation:

• /etc/modprobe.d/iwlwifi.conf
  options iwlwifi 11n_disable=8
  

• Do not be confused with the option name, when the value is set to 8 it does not disable anything but re-enables transmission antenna aggregation.

• In case this does not work for you, you may try disabling power saving for your wireless adapter.

• Information provided by: Arch Linux wiki¹

¹. Content is provided under the GNU Free Documentation License 1.3 or later unless otherwise noted. ↩