Lost wireless connectivity after suspend on Lenovo Z5070

Question

I have Lenovo z5070 with Ubuntu 14.04.2 installed.

I was downloading something on my laptop, and I left it to sleep. When the system woke up the wireless was gone. There was no option for enabling or disabling Wi-Fi.

The problem persisted after reboot.

There is no access point in the access point list and there is no icon that I can use to enable and disable Wi-Fi with. Actually there is no trace of anything related to wireless.

I ran the iwconfig command and the output was:

eth0       no wireless extension

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

02:00.0 Network controller [0280]: Realtek Semiconductor co. Ld. RTL8723BE PCIe 
Wireles Network Adapter [10ec:b736]
        subsystem: Lenovo Device [17aa:b736]
03:00.0 3D controller [0302]: NVIDIA Corporation GM108m [GeForce 840M] [10de:1341] (rev a2)

I've tried to install rtlwifi_new again and sudo make install failed:

What should I do?

score 1 · Answer 1 · edited Apr 13 '17 at 12:24

1

If you previously installed a driver form source using this guide, you will need to re-install it after each kernel upgrade. That may be the case.

If you did not remove sources, then run

cd rtlwifi_new
make
sudo make install

If you DID remove the sources, then download driver as zip.

Extract it to your home folder and install by

cd rtlwifi_new-master
make
sudo make install

And reboot

Also after sleep mode sometimes Network Manager is stuck. You can restart it using

sudo service network-manager restart

edited Apr 13 '17 at 12:24

Community

1

answered May 26 '15 at 10:15

Pilot6

90,100
91
213
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yes I've installed that driver but I didn't upgrade my kernel but I will check the command – Mansoor May 26 '15 at 10:19
You could install normal updates and kernel could be updated too. You do not need to do anything special to upgrade kernel. – Pilot6 May 26 '15 at 10:20
how can I remove the source? – Mansoor May 26 '15 at 10:31
I meant source of Realtek driver. It is in rtlwifi_new folder. Do not delete it. – Pilot6 May 26 '15 at 10:33
I have no net so I can't download rtlwifi_new again – Mansoor May 26 '15 at 10:40
Then do it. The driver is not installed not. Do "git clone ....". It will download it. – Pilot6 May 26 '15 at 10:41
I can't install driver again and I put the result in the main question – Mansoor May 26 '15 at 13:49
I edited the question for your case. – Pilot6 May 26 '15 at 13:51
The problem still goes on without any success – Mansoor May 26 '15 at 14:28
Maybe you pressed a button like Fn+F2 and turned off wireless. – Pilot6 May 26 '15 at 14:29

score 1 · Answer 2 · edited Nov 18 '17 at 14:55

1

finally I found the answer here on Ubuntu Forums.

I just ran the following command and Wi-Fi came back suddenly

sudo modprobe rtl8723be

edited Nov 18 '17 at 14:55

Zanna

70,465

answered May 26 '15 at 14:41

Mansoor

73

The second command does nothing, only gives output. Maybe it makes sense to download driver source, while you can. – Pilot6 May 26 '15 at 14:44
yes you right . there were some commands that the person who suggest this commands says runs after this commands but I didn't run them and nothing get worse. – Mansoor May 27 '15 at 06:04

Lost wireless connectivity after suspend on Lenovo Z5070

2 Answers2