All the tests were done with iommu turned off and SVE turned on in the bios, and it does not boot without iommu=soft
When booting with SVE and IOMMU enabled in the bios I got an endless screen of text and I couldn't make up anything from it. booting with iommu turned on in the kernel and SVE turned off gives the screenshot below ** Attachment added: "IMG_20180621_204111.jpg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747463/+attachment/5155273/+files/IMG_20180621_204111.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1747463 Title: kernel crashes during boot unless IOMMU is disabled on Ryzen 1800X To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1747463/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs