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Peter Humphrey wrote: |
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> Hello list, |
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> |
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> I was looking through dmesg this morning and found 1231 instances (!) of |
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> this error: |
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> |
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> DMAR: DMAR:[DMA Read] Request device [01:00.0] fault addr f400156000 DMAR: |
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> [fault reason 06] PTE Read access is not set |
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> |
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> This is an Intel i7 box with an NVMe SSD and an AMD/ATI Amethyst XT Radeon |
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> R9 M295X display card. The kernel is gentoo-sources-4.4.39. I've tried |
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> setting intel_iommu=on or =pt as kernel parameter to no effect. I don't want |
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> to set it =off because I've read that it slows the machine dramatically. |
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> |
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> Googling has shown nothing, other than playing with that kernel parameter. |
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> Does anyone here know what the problem is? |
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> |
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I'm not sure if it applies but I found this: |
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https://forums.gentoo.org/viewtopic-p-7904584.html#7904584 |
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It should scroll down a bit to the post. The last comment seems to have |
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a solution. |
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Hope that helps. If not, maybe someone else has a better idea. |
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Dale |
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:-) :-) |
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