

For more details see: Forum: RT5370 WiFi cuts out after some hours, needs reboot? Some WiFi adaptors, including Ralink brand, may not work reliably unless 'wireless-power off' is included in /etc/network/interfaces.Wifi adaptors using RTL8188CUS driver will not work in ad hoc mode. If you plan to use your raspberry pi in ad hoc mode, you must verify that your adapter is using the nl80211 driver. In general, devices with RTL8188CUS work great as wifi access point.You may need to enable the non-free repository in your package manager's settings. If you need to install a driver yourself, chances are that it is in your distro's non-free package repository.Therefore, you may need to plug the Wi-Fi adapter into a powered USB hub.


Many of these are applicable to many adapters.
