Hello!

 

I'm running a trial of unraid 6.5.2, and am having some difficulty getting VMs to run when they're configured to leverage a dedicated GPU/Graphics Card (vs. VNC).  While the VM runs fine via VNC, when using a GPU, it fails to start.  The VM log has the following error/warning:

qemu: hardware error: vfio: DMA mapping failed, unable to continue

I've tried disabling SR-IOV, as well as enabling PCIe ACS Override with no luck.

 

Any suggestions on what else to try?  Is there any additional data that I should include here?

 

Thanks in advance!

What's your system specs?

Fair question :)

 

System information from 'Info' link in UNRAID:

 

M/B: Supermicro - X8DT6

HVM: Enabled

IOMMU: Enabled

Cache: 256 kB, 1024 kB, 12288 kB

Memory: 24 GB Multi-bit ECC (max. installable capacity 384 GB)

Kernel: Linux 4.14.40-unRAID x86_64

OpenSSL: 1.0.2o

 

Video Card info from System Devices:

IOMMU group 14:	[8086:244e] 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
	[102b:0532] 01:03.0 VGA compatible controller: Matrox Electronics Systems Ltd. MGA G200eW WPCM450 (rev 0a)

IOMMU group 16:	[10de:0a64] 08:00.0 VGA compatible controller: NVIDIA Corporation GT218 [ION] (rev a2)
	[10de:0be3] 08:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1)
IOMMU group 18:	[10de:104a] 05:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 610] (rev a1)
	[10de:0e08] 05:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1)

 

For reference, I've added two GPUs for testing purposes.  Is there any other data that may be of use?