PSOD LINT1 with VTDIommuFaultHandler

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

PSOD
@BlueScreen: LINT1/NMI (motherboard nonmaskable interrupt), undiagnosed. This may be a hardware problem; please contact your hardware vendor.

PSOD backtrace inlcudes:
VTDIommuFaultHandler

Environment

VMware vSphere ESXi 6.7
VMware vSphere ESXi 6.0
VMware vSphere ESXi 6.5

Cause

• Failing hardware device

Resolution

PLEASE NOTE: A specific device is shown here as an example only.

It could be any hardware that is faulting and this procedures helps to determine the identity of the component.

• The vmkernel-zdump log messages before the crash include a VTD IOMMU fault message:

0:00:00:20.083 cpu0:65536)WARNING: VTD: 162: (Stale Entry) DMAR Fault IOMMU Unit #0: R/W=R, Device 0000:86:00.0 Faulting addr = 0x91de5d000 Fault Reason = 0x6 -> PTE not set to allow Read.

• The fault message shows the PCI device address: 

0000:86:00.0

• lspci shows the PCI device details :

lspci -v

• Output shows that this is a Display Controller 

0000:86:00.0 VGA compatible controller Display controller: NVIDIA Corporation NVIDIATesla  M10 [vmgfx0]

Contact the server hardware vendor.