Original link: https: //blog.csdn.net/sbqwww2011/article/details/80033962
1. Check the card version
lspci | grep Network
I was RTL8822BE
2, installation
1)git clone https://github.com/synthtc/rtlwifi-next
2)cd rtlwifi-next
3)sudo make
4)sudo make install
5)sudo modprobe -rv rtl8822be
Above may result in case wifi can not turn on the option selected, the solution with the following scenario, if the driver has been installed, you can directly use the following programs:
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sudo rfkill unblock all
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sudo rfkill list
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sudo modprobe -r ideapad_laptop