Unable to connect to network after system sleep/resume

[Martin Lopušný]

Hi there,

I am a Kubuntu 16.04 LTS user, (upgraded from 15.10, but the problem also
occured in this version) and I have a problem, which, I found out on the
internet and forums, is wide-spread, but was unable to find a solutio that
would work on my PC.

When I put my computer to sleep and "then wake it up" to resume, the
network adapter is TURNED OFF. The icon is red, inactive, not clickable. I
can go to settings, adjust the connections, etc., but can not connect to
any of them, that option is not clickable.
I can restart the adapter via terminal, which makes the network icon
clickable, BUT, nothing happens. You can click the icon as many times as
you hava patience for, but it does not do anything, as if it was dead.
Actually, the only difference is that it is no longer red, but black (as
active), but thats it, no use of it.

I have to restart my computer and only then I am able to connect to the
network again. This, however, takes some time, I have to reload all my
apps, web pages, etc.

I tried some of the solutions from the forums (restarting the networking
service, or adapter - as above, writing a "SUSPEND MODULES" script to
/etc/pm/config.d/; enabling the option that "All users can connect to this
network," also "modprobe" command to reload the adapter driver, and some
more, but they were mostly based on restarting the network service, which
does not work).

I have a relativelly new hardware, HP Pavilion, manufactured 2015, Intel
based, Intel wireless 3165, driver is iwlwifi, version 4.4.0-24.

Can you please, let me know if there is a solution for this problem? I do
not want to reinstall the system and I doubt that it would help considering
the amount of users affected.

Thank you in advance for your reply.

martin l.
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