I am on ubuntu mate 17.04. When i do
sudo apt-get upgrade
and then restart my computer, i get dropped to the busybox prompt. Then i do theses two steps
dumpe2fs /dev/sda5 | grep superblock fsck -b 32768 /dev/sda5 -y
and then again restart the computer. It resumes normally. But every time i upgrade my machine same story. i have nvidia drivers installed. What is going wrong? Is there a solution other than not upgrading my machine?