I had Ubuntu 19.04 64 bit virtual machine I upgraded it to 19.10. After the upgrade finished the virtual machine has stuck on boot in VMware workstation 15. I had used a vmdk image for 19.04 available here www dot osboxes dot org slash Ubuntu (less than 10 reputation can not post more than 8 links so have to keep it that way)
I made a couple of videos while I was upgrading the virtual machine ( I followed the instructions here www dot liquidweb dot com/kb/troubleshooting-please-install-available-updates-release-upgrading/) The videos are as follows
Ubuntu 19.04 to 19.10 upgrade messages
Part 1: https://youtu.be/la-kwFYGl14
Part 2: https://youtu.be/U_j-aQRMGW4
Part 3: https://youtu.be/80OPkahASmQ
Part 4: https://youtu.be/nPSo-7daCuQ
Now what could be the problem here as why a fresh upgrade is not able to boot into a system. What should I check in here or do to fix this? This is a fresh upgrade and what ever kept happening I let it happen. I logged in to tty6 I get following screenshot. I have not restarted the system since the upgrade from 19.04 to 19.10 kept happening.
Then while I posted this question here I some how was able to restart the system and now I get
end kernel panic not syncing :VFS: Unable to mount root fs on unknown block (0,0)
Here is a video for the same. Now I don't know what should I do. Why this problem came. How to debug this and fix this. Rather than creating a new VM by downloading a new ISO I am more interested to learn and fix the problem which has caused this.
Part 5: https://youtu.be/JhFJEj2dUOM
I seem to have figured out something which might be applicable as mentioned at Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) the thing is before upgrading I did not note down on a paper or pencil as which kernel version was running or to what version the upgrade took place. I have been running defaults only so it should not be a problem. Someone in comments mentioned
"On my ubuntu 19.10 I've had to run apt install initramfs-tools in order to get update-initramfs command –" How can I execute these commands given my situation in video 5.
The thing is I do not know how to work with advanced boot menu please see the screenshots and videos I uploaded to understand my situation.
Even after booting into one of the kernels in advanced options, I get kernel panic messages.
There is some knowledge gap in my situation I probably have figured out something which I should try but I am not able to understand how to proceed from here.