Fix initramfs / boot issues on Grey's X131e
The link above fixed it for me just now. My initramfs (the operating system which gets loaded directly from the disk at boot so you can unlock the encrypted filesystem on your hard drive) was not properly updated after an update to LVM happened AFTER updating my kernel, even though it should have happened AFTER updating my kernel. The LVM update fixed the kernel I was running on (5.0.0-25), but not the kernel being installed after it (5.0.0-29), because someone fucked up the dependency chain.
The fix is just to update the initramfs with "whatever's available" -- you run:
sudo update-initramfs -u -k 5.0.0-29-generic
(or whatever the default is in Grub when you open that up. Force Grub to open by holding left-shift once the Thinkpad bootlogo is gone).
If you aren't able to boot up to do that, bring it in and we'll use a rescue system to fix.