That's may be interesting to this ticket. If one use Ubuntu LIVECD which has linux kernel version 4.15.0-20.21-generic 4.15.17, than the current issue boot errors doesn't appear in console log and operating system boots fine.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773973 Title: Ubuntu 18.04 [ Garrison P8 ]: Machine crashes with oops while booting with 4.15.0-22-generic kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1773973/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
