I notice that if I launch gnome-control-center from the command line
with the "--verbose" option, when I'm on the WiFi tab it prints out all
SSIDs available at extremely high speeds. It seems like maybe the
periodic scan of networks is happening far too quickly. When I switch to
a different tab there is a message about disabling periodic scanning,
and suddenly the CPU usage drops dramatically and everything seems to
work. I also notice that if I use "rfkill" to disable WiFi, and then run
gnome-control-center I can't reproduce the high CPU usage.

I'm attaching a snippet of the printouts that are coming on the WiFi
tab. Notice it is printing about 2000 messages per second.

** Attachment added: "ssid_print_snippet.txt"
   
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1767536/+attachment/5200658/+files/ssid_print_snippet.txt

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https://bugs.launchpad.net/bugs/1767536

Title:
  Accessing the WIFI section of the "Settings" window causes massive
  freezes

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