<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [bdw-u iommu] DMAR error -> GPU hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c54">Comment # 54</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [bdw-u iommu] DMAR error -> GPU hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a> from <a class="email" href="mailto:mqajjhfn@10mail.org" title="Ernest Hurtado <mqajjhfn@10mail.org>"> Ernest Hurtado</a> <pre>Created <a href="attachment.cgi?id=130657" name="attach_130657" title="/sys/class/drm/card0/error Intel HD Graphics 5500">attachment 130657</a> <a href="attachment.cgi?id=130657&action=edit" title="/sys/class/drm/card0/error Intel HD Graphics 5500">[details]</a> /sys/class/drm/card0/error Intel HD Graphics 5500 Hi! I got bite by this bug recently after enabling IOMMU by intel_iommu=on kernel command line. It happen to me once (for now), soon after resume from suspend my GPU hanged. I saw someone recommended disabling EFI framebuffe - how do you exactly do this? Here excerpt from my dmesg: dmesg | grep VGA fb0: EFI VGA frame buffer device fb: switching to inteldrmfb from EFI VGA [drm] Replacing VGA console driver DMESG log during hang: DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr faf16000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf53000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf4f000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr faf56000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf60000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf5b000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf18000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf1a000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf1c000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read] Request device [00:02.0] fault addr faf2b000 [fault reason 05] PTE Write access is not set [drm] GPU HANG: ecode 8:0:0x85dffffb, in Xorg [533], reason: Hang on render ring, action: reset [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [drm] GPU crash dump saved to /sys/class/drm/card0/error drm/i915: Resetting chip after gpu hang dmar_fault: 235 callbacks suppressed DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff267000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff283000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff251000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff291000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff2af000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff2bf000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff2f0000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff2bc000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff2dc000 [fault reason 05] PTE Write access is not set DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [00:02.0] fault addr ff2ed000 [fault reason 05] PTE Write access is not set drm/i915: Resetting chip after gpu hang [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>