Ubuntu 20.04 black screen after installing, no booting

I had the same problem. My computer is a Dell Inspiron 15.

The problem is with UEFI. To fix it you can turn off PPT in the UEFI/BIOS options and enable Legacy Boot.

I too found the same thing on my Inspiron 5567. I had PPT on also, but could still boot any Ubuntu version before 20.04 as well. I'm wondering what's causing this.

However, I did not have to turn Legacy boot on. Just turning PPT off worked just fine.

For those who are new to the BIOS, press F2 when you see the Dell logo, go to Security -> PTT Security and uncheck PTT On. Click Apply (I would recommend choosing Save as Custom User Settings), then OK, then Exit.

I had this problem on a Dell Precision m3800.

Seemed to be something to do with the boot splash screen.

I fixed it by disabling the splash .

do this by removing splash from GRUB_CMDLINE_LINUX_DEFAULT in /etc/defaults/grub

then to apply the change i ran sudo update-grub.