wifi not working after sleep/suspend

Question

I have Ubuntu 16.04 LTS, my wifi was working perfectly but around one month ago every time after suspending the session my wifi doesn't work anymore, although the wifi-interface confirms that the connection has been established. The command

sudo service network-manager restart  

works fine, but I must call it every time I get back from suspending, and it's kind of annoying.

I followed the instructions of wifi still sleeping when resume, but unfortunately the proposed solution fails in my case when calling

sudo systemctl enable wifi-resume.service

returning "command not found". How could I generate a script to fix this problem?

More info on my wireless can be found here: http://paste.ubuntu.com/24334731/

Solution

Both systemd and systemctl seem to be correct. However, to try to help solve your issue, please try:

sudo -i
/bin/systemctl enable wifi-resume.service
exit

Please post any errors or warnings.

Comments

[chili555]

The executable should be located in /bin/systemctl and be able to run without specifying the full path. It is part of the systemd package which comes preinstalled with 16.04. Please show the output of apt policy systemd to verify you have the necessary package installed.

[bruco]

@chili555 here you are with the output you requested: systemd: Installed: 229-4ubuntu16 Candidate: 229-4ubuntu16 Version table: *** 229-4ubuntu16 500 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 100 /var/lib/dpkg/status 229-4ubuntu10 500 500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages 229-4ubuntu4 500 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

[chili555]

How about: ls -al /bin/systemctl I wonder if you have a permissions issue.

[bruco]

@chili555 that's what i get: -rwxr-xr-x 1 root root 659848 janv. 18 23:04 /bin/systemctl

[chili555]

I wonder if you have a 'path' issue, about which I know little. I will propose a solution in a few minutes.

[WinEunuuchs2Unix]

The answer here would work for you too: askubuntu.com/questions/898297/…

[bruco]

I just tried again with the instructions of your answer askubuntu.com/questions/748113/wifi-still-sleeping-when-resu‌​me/… and this time it worked.