http://bugzilla.opensuse.org/show_bug.cgi?id=1048348 Bug ID: 1048348 Summary: AMD-Vi freeze when iommu is on with kernel > 4.4.72 Classification: openSUSE Product: openSUSE Distribution Version: Leap 42.3 Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel Assignee: kernel-maintainers@forge.provo.novell.com Reporter: bruno@ioda-net.ch QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- Created attachment 732108 --> http://bugzilla.opensuse.org/attachment.cgi?id=732108&action=edit HWInfo output Motherboard is a ASUS CROSSHAIR V FORMULA-Z, BIOS 2201 03/23/2015 (latest available) The CPU is an AMD FX(tm)-8350 Eight-Core Processor With 4.4.72 everything was working (since years the hardware was used before with 13.1 and 42.1), even with the nvidia blob ;-) Since kernel 4.4.74 with iommu enabled in bios, I got freeze, like one of the trace I finally found in journal. (Attached) Today I retry with 4.4.75 and get immediately after the system is online a AMD-Vi buffer timeout error. I since then disabled iommu in the bios and the computer doesn't show bugs. (But as the computer should run VM iommu is quite mandatory) I know there was a kernel-firmware and ucode-amd update between the 4.4.72 and now. -- You are receiving this mail because: You are on the CC list for the bug.