Comment 93 for bug 1359689

I believe I'm experiencing the same bug after an in situ upgrade from Linux Mint 17.3 (based on Ubuntu 14.04) to 18.0 (running 4.4.0 kernel by default). I find that the boot process changes the graphics mode once (after selecting the default kernel) but with a black (but lit) screen (as opposed to the black unlit screen when modes switch), no visible text or graphics.

Prior to the upgrade I was also running a 4.4.0 kernel (with 17.3), and had no issues with getting the orange-ish decryption screen prior to the full boot.

I find that I can enter my passphrase even without seeing a prompt, and (if typed successfully!) it then proceeds to a graphical login.

Going back to an earlier kernel (4.2.0, still installed) gives me a text-mode decryption form (not the graphical mode version).

I'm running this on a Thinkpad X1 Carbon (v2) with 1600x900 LCD, Intel graphics. I've implemented the suggested GRUB tweaks above and will report if they make any difference at my next reboot.