I recently purchased Lenovo Thinkpad E585 with AMD Radeon Vega 10 graphics card and preinstalled Windows 10. To install Ubuntu 18.04.2 in dual boot, I have shrunk my C drive. Now, when I boot with a flash drive and Grub screen appears, my screen turns black upon pressing 'Install Ubuntu'.
Following this famous question: 'My computer boots to a black screen, what options do I have to fix it?' and one here, I replaced
quiet splash with
nomodeset and then with
acpi = off and
radeon.modeset=0 but nothing of them worked. Replacing with
nolapic brought some lines of text but it stopped there and didn't proceed further in about half an hour so I had to forcefully turn the laptop off.
Flash drive has no issue as the same bootable flash drive is working on my old laptop. Also, my Ubuntu image file is okay as I tried several images and all of them bring this issue. It appears this also has nothing to do with UEFI vs Legacy modes: I initially had
fast startup and
secure boot enabled and this issue appeared. Then I disabled both of them and played with UEFI and Legacy settings in BIOS but it didn't help. Hence, I believe the issue lies with the AMD graphics card.