I've installed 8 times now, and most times, I got it to start and see the desktop.
On Shutdown, I get fails to unload /cdrom, and failed to unload isodevice and hangs there.
Powering off, and rebooting again, I get the login screen (first time that happened), and after logging in, I see a light-grey screen with a small darker border and after 11 seconds, the green logo, then after 48 seconds (timed it) I get a black screen sometimes with a cursor, sometimes not. The only thing that works, is the fan the black screen, and the mouse - sometimes the mouse.
How I installed:
I downloaded the cdrom/ link to get "ubuntu-mate-20.04-desktop-amd64.iso"
This was burned to a 8 Gig USB Drive using Balena-Etcher (because the first suggested Universal-USB-Installer refused to format the USB Memory Stick).
The USB Thumb Drive was inserted into the ltop and booted. That opened Pandora's Box.
Too many install fails so I re-burned the USB stick
Re-installed - again- and made it to the desktop.
There was no request to set up user, or password or to remove the USB Flash Drive.
I noted that there was a Install Ubuntu-Mate icon. I thought that was what I just installed so many times but what the h , I clicked it, and eventually, asked to set up a user name and password. That done, I did a restart and was again greeted with "Failed to unmount /cdrom and /isodevice.
Now, when I boot, I get a most private system, it's a black screen with no input from mouse, touch pad, or keyboard. No amount of old or newly invented cussing helped any.
What else have I done:
I bought a new USB dongle, re-downloaded "ubuntu-mate-20.04-desktop-amd64.iso", re-imaged to USB Pen Drive, and re-installed again.
As it turns out, there is was no opportunity to reformat, wipe, or partition the HHD, anf the Installer saw Ubu was installed, checked the files (./casper/filesystems.quashfs )), started Ubu again, with logo in centre screenand the 5 whites dots below it stay white and that is the end of that install. It hange there.
= two bricked USB (whatevers), one bricked laptop and 15 new curses to added.
What kind of laptop should I buy to make Ubuntu 20.04 install?
~s~ I'm feeling very right now >:(
16 hours in two days I've put into this and only got as far as forced to use Windows to ask how to make Ububtu install.