Comment 29 for bug 1409032

After not be satisfied with any of the above workarounds to the problem
I decided to take a look at the problem and see if I could come up with
a "cleaner" workaround or fix.

I found that this problem occurs in Ubuntu 16.04 with Unity Gnome 3.18
GnomeShell Gnome 3.20, Budgie Gnome 3.18 and Fedora 24 Beta.

After some troubleshooting I found the following solution that does
not require changing executable permissions or removing packages:

1- Make a backup copy of the smb.conf file in /etc/samba.

2- Edit the /etc/samba/smb.conf file using your favorite editor
and add the following line under the "[global]" statement:

name resolve order = wins lmhosts bcast

The file should look like this:

[global]
name resolve order = wins lmhosts bcast

3- Save the file and reboot.

The problem should be fixed and you should notice that the
"Network" Icon and label shows up much quicker in your
file browser than before and the 100% CPU usage is gone.

Hope this helps.