I tested again. THis time I got the login screen and logged in then the screen got distorted as the display manager would not work correctly. I did "journalctl -b 0" and found also a crash file in var/crash/... I attach both files here.
** Attachment added: "bootlog" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/1872452/+attachment/5354081/+files/bootlog -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872452 Title: [amdgpu] Boot into black screen without power supply (Kubuntu on AMD / Thinkpad T495) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/1872452/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
