4

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/

Community
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bruco
  • 313
  • 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. – chili555 Apr 10 '17 at 13:23
  • @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 – bruco Apr 11 '17 at 08:58
  • How about: ls -al /bin/systemctl I wonder if you have a permissions issue. – chili555 Apr 11 '17 at 12:55
  • @chili555 that's what i get: -rwxr-xr-x 1 root root 659848 janv. 18 23:04 /bin/systemctl – bruco Apr 12 '17 at 08:37
  • I wonder if you have a 'path' issue, about which I know little. I will propose a solution in a few minutes. – chili555 Apr 12 '17 at 13:02
  • The answer here would work for you too: http://askubuntu.com/questions/898297/wifi-signal-icon-switches-to-ethernet-icon-up-down-arrows-after-suspend/899304#899304 – WinEunuuchs2Unix Apr 12 '17 at 17:15

4 Answers4

2

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.

chili555
  • 60,188
  • I just tried again with the instructions of your answer http://askubuntu.com/questions/748113/wifi-still-sleeping-when-resume/748130?noredirect=1#comment1413928_748130 and this time it worked. – bruco Apr 13 '17 at 09:54
1

In the present case, after coming out of sleep my wifi was rfkill-blocked (normally this doesnt happen) and it only had to be unblocked.

(sidenote: I found out after trying to manually bring up the wifi interface with sudo ip link set wlp6s0 up -> output was: RTNETLINK answers: Operation not possible due to RF-kill)

solution was:

rfkill list       # (to show all interfaces, if anyone has soft or hard-block "yes" it cant be used)
# output:
#   2: phy0: Wireless LAN
#      Soft blocked: no
#      Hard blocked: no
sudo rfkill unblock wlan    # you can use the number or the name/category, see `man rfkill`

after unblocking (maybe check again with rfkill list), wifi was working again

MacMartin
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0

In my case, I "fixed" it with sudo ifconfic <wireless_card> up evey time I suspend the computer. It's not perfect, but it works eventually.

user___
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0

I resolved this issue with "enable Airplane Mode" and disabling it again. Wireless connection started to resume. Hope this helps.

Murali Thirumalai
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