Kernel won’t start: can’t even boot up

[TriMoon]

@lplcleary

Was trying to run some code on my gpu using cuda, computer froze, forced a shutdown.

You most probably need to repair your filesystem.
In future never force power off or reset, but use what is explained in link below:

[HowTo] reboot / turn off your frozen computer: REISUB/REISUO

Difficulty: ★★☆☆☆ This tutorial was created because people are using a hard power off during freezes, so this will teach you how to turn off your computer when everything is frozen using softer means. So whenever you see someone saying they had to “Power Off” or “Hard Reset” their system without doing a REISUB, please send them here! If you’re reading this in response to a question, please click the green link above this text to bring you to the full unabridged text of the tutorial…