<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_CLOSED bz_closed" title="CLOSED DUPLICATE - [bdw-u iommu] GPU Hang due to DMAR:[fault reason 05] PTE Write access is not set" href="https://bugs.freedesktop.org/show_bug.cgi?id=92905#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_CLOSED bz_closed" title="CLOSED DUPLICATE - [bdw-u iommu] GPU Hang due to DMAR:[fault reason 05] PTE Write access is not set" href="https://bugs.freedesktop.org/show_bug.cgi?id=92905">bug 92905</a> from <a class="email" href="mailto:gdamjan@gmail.com" title="Damjan Georgievski <gdamjan@gmail.com>"> Damjan Georgievski</a> <pre>Happens to me too when booting 4.13.3 (also .2). Hardware is Thinkpad T450s, latest bios updated DMI: LENOVO 20BWS10N00/20BWS10N00, BIOS JBET65WW (1.29 ) 06/15/2017 i7-5600U (Broadwell) Booting 4.13.3-1-ARCH hangs when starting Xorg (sddm), the message I caught via ssh in the first second before it was hung completely was: [ 123.917760] DMAR: DRHD: handling fault status reg 2 [ 123.917765] DMAR: [DMA Write] Request device [00:02.0] fault addr 108a000 [fault reason 23] Unknown 4.12.13-1-ARCH works fine 4.9.51-1-lts works fine too Distro is Archlinux. Booting in CLI works fine too. Booting with "intel_iommu=on,igfx_off" on the kernel command line also works fine. $ zgrep IOMMU /proc/config.gz CONFIG_GART_IOMMU=y CONFIG_CALGARY_IOMMU=y CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT=y CONFIG_IOMMU_HELPER=y CONFIG_VFIO_IOMMU_TYPE1=m # CONFIG_VFIO_NOIOMMU is not set CONFIG_IOMMU_API=y CONFIG_IOMMU_SUPPORT=y # Generic IOMMU Pagetable Support CONFIG_IOMMU_IOVA=y CONFIG_AMD_IOMMU=y CONFIG_AMD_IOMMU_V2=m CONFIG_INTEL_IOMMU=y CONFIG_INTEL_IOMMU_SVM=y CONFIG_INTEL_IOMMU_DEFAULT_ON=y CONFIG_INTEL_IOMMU_FLOPPY_WA=y # CONFIG_IOMMU_DEBUG is not set # CONFIG_IOMMU_STRESS is not set</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>