I have a similar HP dc5800 machine. Booting from 4.15 kernel after upgrade to Ubuntu 18.04 results in very quick kernel crash (less than 1 second), as does booting from the Ubuntu 18.04 "desktop" install DVD.
In both cases booting with "acpi=off noapic" added to the kernel boot parameters works fine, except that the machine does not power down after "/sbin/shutdown -P". Oddly enough this machine worked fine with the 4.4 kernels from Ubuntu 16.04, so this might be a regression bug in the kernel? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1772038 Title: ubuntu/xubuntu 18.04 kernel crash during install. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1772038/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs