I ran into the same issue on a fresh install of 18.04. Before downloading the updates I could boot just fine but now I always get stuck on a purple screen.
However there is a catch, my system uses a AMD CPU (Athlon II X2 245) If I boot into recovery mode, a bunch of text passes by (so fast that I can't read it) before getting stuck on [SDG] Attached SCSI disk -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1829735 Title: Fresh install of 18.10 stuck at initializing ramdisk after sudo apt upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1829735/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs