查看wifi与蓝牙硬件开关，发现ideapad的硬件模块都是关闭的
rfkill list all
打开终端
输入
sudo gedit /etc/rc.local
写入以下内容 进行保存
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing. echo "" |sudo modprobe -r ideapad_laptop
exit
为了保证重启生效，需要给予权限 终端输入
sudo chmod /etc/rc.local
然后输入
reboot
重启后发现wifi正常使用，但是信号远比WIN要差切容易断
解决方案
sudo apt-get install git build-essential linux-headers
git clone https://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install
reboot