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Black screen when booting Ubuntu from USB on iMac Pro 2017

Cerebroside

New Member
I would like to boot Ubuntu on my iMac Pro 2017 with Radeon Pro Vega 64. T2 Secure boot is deactivated. I tried it with Ubuntu 19.10 from an external usb ssd but I always get a black screen after the ubuntu boot menu. I guess it is a problem with missing drivers for the video card. If anyone has an idea it would be much appreciated.
 
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wizardfromoz

Super Moderator
Staff member
Gold Supporter
G'day @Cerebroside and welcome.

Have you tried it with

nomodeset

in the startup parameters? I take it 19.10 is installed, is that so?

Back tomorrow

Wizard
 

Cerebroside

New Member
Have you tried it with

nomodeset

in the startup parameters? I take it 19.10 is installed, is that so?
Hello and thanks for your reply!
I only get a text-only boot menu. Headline is GNU GRUB version 2.04
The options are
Try Ubuntu without installing => black screen
Try Ubuntu without installing (safe graphics) => black screen (this is the modeset option, isnt it?)
Install Ubuntu
Install Ubuntu (safe graphics)
OEM install
Check disk for errors


By pressing c[edited] e I can edit the startup options. I tried to edit the safe graphics settings from nomodeset to radeon.modeset=0 as I read in another forum.
But I also got a black screen.
 
Last edited:

wizardfromoz

Super Moderator
Staff member
Gold Supporter
OK so you have not installed yet, you are stuck with the live usb stick not going past the menu options.

What method did you use to burn the .iso, for example Etcher or other?

Wiz
 

wizardfromoz

Super Moderator
Staff member
Gold Supporter
By pressing c I can edit the startup options.
that should be 'e' for edit, c is for commands

from my stick the following - after inserting nomodeset

rfter-nomodeset.jpg


The above is from the MATE desktop version - makes no difference.

wizard

broken shoulder - hospital tomorrow. someone else may help good luck
 
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