https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237357
Bug ID: 237357
Summary: ThinkPad X240 doesn't resume from suspend with IOMMU
DMAR enabled
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
With hw.dmar.enable=1, this Haswell laptop doesn't wake up from S3, similar
symptoms to what it was doing when the TPM was enabled: no reaction to lid open
/ power button press, power LED keeps blinking.
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