The system booted, so it's not a syslinux issue. Maybe kernel? I'm unsure, as I didn't see anything obviously wrong (to me) in the attached logs, but the mtrr messages are unusual and warrant some further investigation.
Reassigning to linux. ** Package changed: syslinux (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1824669 Title: Live boot fails legacy boot Kubuntu 19.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1824669/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs