解决ubunti16.04wifi无法使用，，打不开，，fn+f2无法使用的问题

本文提供了一种诊断无线网卡问题的方法，包括检查驱动是否可用、加载状态、WiFi硬阻塞状态及笔记本待机恢复后的无线状态。若所有检查项符合特定条件，则确认存在该Bug并给出解决方案。

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 原地址
 https://ubuntuforums.org/showthread.php?t=2181558

 1) Check if a driver is available for the card (open a terminal with Ctrl-Alt-T and enter the following command in it) :

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 lspci -nnk | grep -A2 0280

 Notice the last line that says "Kernel driver in use:".

 Is there a module name in front of it? (e.g. "Kernel driver in use: ath9k")

 2) Check if the driver is loaded and if "asus_nb_wmi" driver is also in use :

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 lsmod | grep -e ath9k -e asus

 (replace "ath9k" with whatever driver is used by your wireless)

 Do you see the driver for your card, and "asus_nb_wmi" both in the above output?

 3) Check the "Hard blocked" state of wifi -

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 rfkill list all

 Note the state of the "phy0" interface.

 Does it show as "Hard blocked: yes" ?

 4) Suspend the notebook by pressing Fn+F1 (or any other way) --> then resume it again.

 Does the wireless become active now?

 If the answer to all four checks above is yes (no.4 may be an exception for a few), then your system has this bug and the workaround is as follows -