I think I am experiencing the same issue. Upgrade to Ubuntu 18.04 failed. Startup does not complete and screen sequences through: blank, startup console output and corrupt/uninitialised screen with lots of colours. Log in almost impossible on other console as screen switches back. Managed to log in via ssh from a laptop and captured first 1000 lines of output from dmesg - see attached. >From ssh login on 8th July managed to upgrade all packages but problem >persists.
** Attachment added: "Output from dmesg on problem machine to error message" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1766075/+attachment/5161167/+files/apport-data-1766075 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766075 Title: AMDGPU Failed to blank To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1766075/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
