Can confirm the problem: started to occur after the update to kernel
4.4.0-45 and nvidia 367.57 and it is the combination of kernel version
and nvidia-driver that causes the problem. There are no problems when
the nvidia-driver is purged and nouveau is used instead. I am using full
disk description.

Last working kernel with nvidia 367.57 is 4.4.0-43.

Kernel 4.4.0-47 does not fix the problem.

Symptoms are either a black screen with blinking underline-prompt in the
topleft corner (no fde password prompt, no possibility to switch to
console) or a low-res graphical screen for fde password entry, but no
way to actually type the password.

Setting GRUB_CMDLINE_LINUX_DEFAULT="nomodeset" works for me (it is
important to remove "quiet splash" if "nomodeset" is inserted into an
existing line) – with this setting, the fde password can be entered in
the console and the system boots normally with nvidia 367.57 and kernels
4.4.0-45 and 4.4.-0-47.

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https://bugs.launchpad.net/bugs/1638990

Title:
  nvidia-367 with kernel 4.4.0-45-generic won't boot

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