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点了右上角的启用无线的勾之后想用无线上网，发现没打开无线网络
之后再看了下右上角的勾。。。发现自动取消了。。。用IWCONFIG查看得到这个。。。

lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11bg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off

ppp0 no wireless extensions.

[原因]Ubuntu upgrade的rfkill tool默认block了wifi模块

　　[解决]

　　[email protected]:~$ rfkill list

　　0: hp-wifi: Wireless LAN

　　Soft blocked: yes

　　Hard blocked: yes

　　1: phy0: Wireless LAN

　　Soft blocked: yes

　　Hard blocked: yes

　　rfkill unblock all 干掉所有软件block

　　[email protected]:~$ rfkill list

　　0: hp-wifi: Wireless LAN

　　Soft blocked: yes

　　Hard blocked: yes

　　1: phy0: Wireless LAN

　　Soft blocked: no

　　Hard blocked: no

　　Hard block 问题： Fn+F2 解决 (明明laptop有wifi的硬件开关，Linux还是默认这对冤家当硬件开关)

　　[搞定]

　　[email protected]:~$ rfkill list

　　0: hp-wifi: Wireless LAN

　　Soft blocked: no

　　Hard blocked: no

　　1: phy0: Wireless LAN

　　Soft blocked: no

　　Hard blocked: no

　　问题解决了!


sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start

2楼真的假的?

2次实验结果，不敢独享！
补充一点：/etc/NetworkManager/NetworkManager.conf内面设置改manager=true先