Ubuntu 20.04 black screen after installing, no booting

Question

I´ve just installed 20.04 on my laptop, replacing 19.10.

The USB installer process worked perfectly, but after rebooting, I´m getting a black screen right after the grub, with no text, and selecting recovery mode gets stuck on "loading initial ramdisk".

I have tried editing the boot parameters, removing quiet splash, and changing gfxmode $linux_gfx_mode for gfxmode text, to be able to see some kind of info at boot, but the black screen still persists.

Any suggestion?

Machine: DELL Inspiron 15 5567 AMD Radeon R7 M445 Graphics Intel i7 Processor

Dual boot Ubuntu 20.04 + Windows 10 (it was working fine with 19.10)

Bios: Uefi, security OFF.

Answer 1

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.

Answer 2

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.

Answer 3

I had this problem on a Dell Precision m3800. It seemed to have something to do with the boot splash screen.

I fixed it by disabling the splash. I did this by removing splash from GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and running:

sudo update-grub

to apply the change.

Answer 4

For me, the problem was that I would get only a black screen when trying to boot 5.11.0.34, but I could boot 5.11.0.27 with no problem. I resolved it by stepping back from nvidia-driver-470 to nvidia-driver-450. You can find the GUI to make this change in Software & Updates | Additional Drivers.

Steve