** Changed in: linux (Ubuntu Jammy)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1951440
Title:
Enable CONFIG_INTEL_IOMMU_DEFAULT_ON and
CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON on jammy 5.15
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Jammy:
Confirmed
Bug description:
Starting with the following commit, upstream kernel is enabling Intel
IOMMU related options by default:
792fb43ce2c9 ("iommu/vt-d: Enable Intel IOMMU scalable mode by
default")
We should follow upstream direction enabling
CONFIG_INTEL_IOMMU_DEFAULT_ON and
CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON.
A downside is that this change may introduce boot regressions on old
systems (especially those with buggy firmware).
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