I can confirm I also have this issue on an ACER Nitro 5 AN515-42-R5GT. Ryzen 2500U + RX560X using latest BIOS available v1.08. I'm forced to boot with noapic whether or not IOMMU is even enabled/disabled using kernel 4.18.10.
Using 4.19.0rc2 I could get by using the GRUB additions: i8042.nopnp ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 iommu=pt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1776563 Title: Acer Aspire A315 IOAPIC failure on Ubuntu 18.04, kernel hangs, can't load, kernel freeze (AMD Ryzen 5/Radeon/Raven) / AMDGPU Hybrid crash To manage notifications about this bug go to: https://bugs.launchpad.net/amd/+bug/1776563/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
