Yes, I also got the gcc update after the kernel update. With the new
gcc, I could fix the Nvidia kernel module.

Here's how:
# Show the current vermagic string of the kernel module
modinfo nvidia-384 -k 4.4.0-116-generic

# It will probably say:
# vermagic:       4.4.0-116-generic SMP mod_unload modversions
# Here the retpoline string is missing.
# You can fix this by removing and re-building the module with DKMS

sudo dkms remove nvidia-384/384.111 -k 4.4.0-116-generic
sudo dkms install nvidia-384/384.111 -k 4.4.0-116-generic

# After that the modinfo command will show
# vermagic:       4.4.0-116-generic SMP mod_unload modversions retpoline

You can now use the new kernel. You will probably have to do this with
all your DKMS kernel modules.

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1750937

Title:
  4.4.0-116 Kernel update on 2/21 breaks Nvidia drivers (on 14.04 and
  16.04)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1750937/+subscriptions

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