[Bug 89360] [bdw-u iommu] DMAR error -> GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89360

--- Comment #69 from François Guerraz <kubrick at fgv6.net> ---
This bug has affected many people on arch on a variety of devices when a
maintainer switched on CONFIG_INTEL_IOMMU_DEFAULT_ON in kernel 4.13.x
See the bug report: https://bugs.archlinux.org/task/55629

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