Public bug reported:

I have just upgraded from 16.04 to 16.10. The installation has dm-crypt
installed in the whole hard drive.

If I try to boot up the computer with kernel 4.8.0-26, most of the time
(probably 9 out of 10) the computer gives a black screen instead of
prompting for the dm-crypt passphrase. I try to remove "quiet splash"
from grub (I can see the grub boot menu every time) but this does not
help.

Even I am lucky when the system prompts me for passphrase and the
computer comes up successfully, the screen goes completely black again
if the screen turns off once I idle the computer for a few minutes. The
computer is still running (I can login to the computer remotely), just
the screen becomes unavailable no matter what key I press.

I still have the old kernel 4.4.0-45 from 16.04 installed and this
kernel allows me to boot up the computer every time.

My computer is a HP Elitebook 745 G3 notebook with AMD PRO A10-8700B R6
APU.

Please let me know if I need to provide other information.

** Affects: xserver-xorg-video-amdgpu (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1637646

Title:
  Black screen when booting

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