X hangs the whole machine (black screen) when both of these conditions (Base Mosaic + IOMMU) are true
-when IOMMU is off everything works
-when Base Mosaic is off everything works
Machine is: Intel i7-4820k running linux-4.14.3-1 64-bit
2x Quadro NVS 420 cards
This is probably an edge case that hasn’t been accounted for yet.
The only online result that seems remotely related was on this page:
What solution is there for this?
-IOMMU is required for PCI pass-through to virtual machines (a device other than the 420s) so disabling it is not an option
-Base Mosaic is required for efficient use of 8 monitors so disabling this is also not an option.
I sincerely appreciate your time!
p.s. Tomorrow I will try to run the nvidia bug report script over ssh and will update as soon as I get it.
nvidia-bug-report.log.gz (135 KB)