iwlwifi
iwlwifi is the wireless driver for Intel's current wireless chips, such as 5100AGN, 5300AGN, and 5350AGN. See the full list of supported devices. The firmware is included in the linux-firmware package. The linux-firmware-iwlwifi-gitAUR may contain some updates sooner.
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:
/etc/modprobe.d/iwlwifi.conf
options iwlwifi 11n_disable=1 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.[10] [11]
In case this does not work for you, you may try disabling power saving for your wireless adapter.
Some have never gotten this to work. Others found salvation by disabling N in their router settings after trying everything. This is known to have be the only solution on more than one occasion. The second link there mentions a 5ghz option that might be worth exploring.
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