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I purchased a new Lenovo ideapad 100 laptop back in February. A couple of days ago I formatted the hard-drive and replaced the original operating system, Windows 10, with Ubuntu 16.04 64-bit.

Most things are working fine but the wifi occasionally stops working. When I try to install gimp from the ubuntu software centre and apache from apt-get in the terminal it always stops working and I have to restart the computer to get it back. It also stopped working when I tried posting this question here.

The output to lspci -knn | grep Net -A2 is:

03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd.   RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
Subsystem: Lenovo RTL8723BE PCIe Wireless Network Adapter [17aa:b728]
Kernel driver in use: rtl8723be
Kernel modules: rtl8723be
Mohamed Slama
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Tom brown
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2 Answers2

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I had a similar problem with a Lenovo ideapad 300:

01:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter [10ec:8821]
Subsystem: Lenovo RTL8821AE 802.11ac PCIe Wireless Network Adapter [17aa:a814]
Kernel driver in use: rtl8821ae
Kernel modules: rtl8821ae

Modifying the drivers and settings made no difference. I spent almost a week on this. In the end, installing wicd fixed it.

Paul Sinnett
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It stops working or it not detects other wifi networks? If the second (like my lenovo does) the only think i found is restarting the following service 

sudo rm -f /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager restart
dessert
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Chris Zotalis
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