I recently installed the NVIDIA
319 driver from the Jockey window, and now X won't load! I'm stuck with a blinking cursor. I used to have the
304 drivers installed.
How do I fix this?
What happened is actually pretty common. You most likely did not uninstall the old driver.
You need to go and boot into recovery mode. Steps are below.
Bonus Step: Fix Plymouth (the Ubuntu boot logo) by following this tutorial from WebUpd8.