Same issue here, no Wi-Fi or ethernet connection working.
No resolution problems, but when I restarted after the update I noticed the 
dimension of the Launcher icons was different than usual (it's usually set at 
38, after the update it was switched to 48 or something like that).
Getting back to 4.4.0-75 from Grub makes everything go back to normal.
I'd like to help if possible, but I'm a REAL newbie on Ubuntu!

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https://bugs.launchpad.net/bugs/1687623

Title:
   4.4.0-77-generic breaks internet on 16.04.2

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Hi as per title today I updated to  4.4.0-77-generic on my Lubuntu
  16.04.02 and wifi is not working anymore. When I click on the network
  manager I see "enable networking" (which is toggled) but no more the
  option about wifi.

  I reported this on ubuntuforum:
  https://ubuntuforums.org/showthread.php?t=2360216

  Where a user suggested to revert to an older kernel and see if this
  fixes the problem. I managed to revert to 4.4.0-75-generic via grub
  and everything works perfectly.

  Another user reported a similar issue caused by the same upgrade on
  the same system: https://ubuntuforums.org/showthread.php?t=2360215

  Can someone else confirm this bug?

  If you need more information I will be happy to provide it (I am a
  newbie though so please be patient).

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