https://bugzilla.kernel.org/show_bug.cgi?id=200087
--- Comment #204 from Suravee Suthikulpanit (suravee.suthikulpa...@amd.com) --- For IOMMU-related part, as mentioned above, the IVRS table does not list the correct IOAPIC IDs. This would cause driver to disable interrupt-remapping support provided by HW IOMMU. Here the "ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2" boot option is needed to override the table. Permanent solution would be for laptop OEMs (e.g. Acer, Lenovo) to fix this in their BIOSes. Another alternative would be: * Disable IOMMU in the BIOS (which should also get rid of the IVRS table) * Disable HW IOMMU and use SWIOTLB for any DMA-remapping (iommu=soft) However, I'm not sure about why the "noapic" option is needed. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
