I have seemingly similar problem on Intel NUC DE3815TYKHE (ntel Atom CPU E3815). On 4.15.*, it takes more than 5 minutes to unpack the initramfs (below is an example on 4.15.0-36). With the acpi=noirq, the kernel boots as usual.
$ dmesg | head -2; dmesg | grep -A1 initramfs [ 0.000000] Linux version 4.15.0-36-generic (buildd@lgw01-amd64-031) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 (Ubuntu 4.15.0-36.39-generic 4.15.18) [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=a6268849-42cb-4d0e-80f3-eb2704407c01 ro vga=normal [ 1.613146] Unpacking initramfs... [ 350.054603] perf: interrupt took too long (2503 > 2500), lowering kernel.perf_event_max_sample_rate to 79750 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1788387 Title: After upgrading from 4.4.0 to 4.15.0 system doesn't boot - ACPI issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788387/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
