3 Replies Latest reply on Mar 3, 2014 9:00 PM by groupwest8

    NUC 4250u vt-d not working under Citrix XenServer

    Olof

      I can't enable GPU passtrough in XenServer. I receive the error message that my hardware doesnt support this. To be able to support this, vt-d is required.

      This is enabled in my bios (version 0021).

      In several forums with simular issues, the conclusion this is a bug in the bios.

      Any solution / suggestion for this issue?

       

      Some XEN output:

      (XEN) Domain heap initialised DMA width 32 bits

      (XEN) ACPI: 32/64X FACS address mismatch in FADT - dbc90080/0000000000000000, us                                         ing 32

      (XEN) Processor #0 6:5 APIC version 21

      (XEN) Processor #2 6:5 APIC version 21

      (XEN) Processor #1 6:5 APIC version 21

      (XEN) Processor #3 6:5 APIC version 21

      (XEN) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-39

      (XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs

      (XEN) [VT-D]dmar.c:264: Invalid device scope.

      (XEN) Failed to parse ACPI DMAR.  Disabling VT-d.

      (XEN) Not enabling x2APIC: depends on iommu_supports_eim.

      (XEN) Using scheduler: SMP Credit Scheduler (credit)