Hello all, On 5/6/15 7:47 PM, Chen, Tiejun wrote: > #1. Disable interrupt message generation > #2. Please add 'cpuidle=0 msi=1' With another try, get the same with the patched kernel: (XEN) **************************************** (XEN) Panic on CPU 2: (XEN) queue invalidate wait descriptor was not executed (XEN) **************************************** I had 'intel_iommu=off' are per a suggestion I found and removed it. See "intelpatch2.txt" for this output. "intel-no-xorg.txt" is the successful lifecycle of the same DomU without Xorg running for reference. Michael Dexter