Q: Upgrade 19 to 20 error - Tilting black screen with top-left cursor before login PC: Lenovo X201 - 2010
Intel Core i5 vPro
BIOS: 1.16 2010
Embedded controller version - 1.09
GNU GRUB - 2.04
Linux 4.15.0-119
Description:
I have recently tried to upgrade from Ubuntu 19.04 to 20.04 via command line on terminal. The process went okay until it shot down not initializing after the completion. I had to turn it on again with On/off button. After this I was never able to login again.
So I am not sure which version is currently on. Accessing the GRUB menu and clicking on Advanced Options I have these following options:

*

*Ubuntu, Linux 4.15.0-119 generic and recovery mode

*Ubuntu, Linux 4.15.0-118 generic and recovey mode

*Ubuntu, Linux 4.15.0-117 generic and recovery mode
None of them goes past the black screen with top-left cursor.
After the booting process, the Ubuntu Logo appears (19.04 logo) and buffers only to the second dot, and then goes tilting - like on and off - until it reaches a static point with a cursor on top left.
During this, when I forcefully reboot - ctrl+alt+del - the Ubuntu 20.04 logo appears right before the computer reboots.
This is what I already tried - Failed attempts:
Removed 'quiet splash' on GRUB 'e' command line and added 'nomodeset' on linux line as a temporary fix. Result: failed to disable graphics turbo
Did the same process on GRUB > Recovery mode > Root > with the command: 'sudo nano /etc/default/grub' and then 'update-grub'. Result: failed to disable graphics turbo
Downloaded missing packages on GRUB with root access. Result: same tilting black screen followed by the top-left cursor.
Some options after a research that I couldn't manage to do:
Change boot priority on BIOS - my Bios does not have the security PPT to begin with.
Reinstall NVIDIA drivers - I don't know how to do that, but when I put on command as root on GRUB - '$ sudo lshw -c video' , i got this
VGA compatible controller - core processor integrated graphics controller
Some additional troubleshooting I did:
Hard Disk Drive diagnosis program - main hard disk drive
Result: error code 0100: speed test failed
Any feedback is going to be very helpful, thanks a lot !
