wifi偶而會無緣無故斷線,
今天看到一篇在講網卡power save,
可是沒辦法用iwconfig wlan0 power off去關掉,
會有錯誤訊息
Error for wireless request "Set Power Management" (8B2C) :
    SET failed on device wlan0 ; Invalid argument.
後來找到另外一篇 How can I prevent iwconfig power management from being turned on?
裡面寫到用 iw dev wlan0 get power_save 去看status.
我試了iw dev wlan0 set power_save off是可以成功.
再來就看看wifi會不會比較穩了.

 Ref:

• Arch Linux -> Network configuration/Wireless
• Linux Wireless documentation