When the machine is booted, open a terminal and run "dmesg" to see on what the kernel was stuck so long. In my case, it was the intel-lpss PCI device initialization, and I fixed it by disabling the Intel IOMMU. If you get similar results, this issue might be a duplicate of mine which I reported here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973167 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1973234 Title: Slow Boot, No SOUND, No Ethernet To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973234/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs