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<blockquote data-quote="Benoire" data-source="post: 1057615" data-attributes="member: 121281">So to add this item (and it is one per device passthrough and it must match the passthrough device number, i.e. 4 devices will yeild a final line of pcipassthru3.msienabled = false) you must edit settings, go to the second tab on the top level and select general.&nbsp; In that area there will be a section called advanced with a table of settings.&nbsp; Add the line there.Would recommend you copy the VM first as once added the lines cannot be removed.&nbsp; I'm not an expert so please forgive me but as I understand it it is all to do with msi-x interupts.&nbsp; A host pc has xxxx amount of these vectored interupts, normally it is not a problem on a bare metal install as the os can play around with them natively however with a hypervisor, the host takes a number of them leaving VMs with a lot less.&nbsp; Sometimes, some pci cards can cause trouble by exceeding the available amount leading to problems... This mode changes the handling and makes it less demanding.&nbsp; I had trouble of the stream not lasting more than 5 minutes before shutting off, after adding this line per pci device it was ok for around 2 hours but then still died.I'm not trying out Xen 4.3.1 to see if that would work.&nbsp; Harder to manage as there are no guis but I've seen full GPU passthrough work fine in a windows 8 vm and also read tv tuners work.&nbsp; Xen is a full hypervisor built on your choice of linux but most of the commands are issued through SSH or via cfg files until the VM has booted.What is your hardware?&nbsp; Mine is as follows:AMD FX-6100 6 core cpuGigabyte GA-970-UD3 (with IOMMU)14GB RamLSI SAS controllerHDDs2 x TBS 6981s.</blockquote>

[QUOTE="Benoire, post: 1057615, member: 121281"] So to add this item (and it is one per device passthrough and it must match the passthrough device number, i.e. 4 devices will yeild a final line of pcipassthru3.msienabled = false) you must edit settings, go to the second tab on the top level and select general. In that area there will be a section called advanced with a table of settings. Add the line there. Would recommend you copy the VM first as once added the lines cannot be removed. I'm not an expert so please forgive me but as I understand it it is all to do with msi-x interupts. A host pc has xxxx amount of these vectored interupts, normally it is not a problem on a bare metal install as the os can play around with them natively however with a hypervisor, the host takes a number of them leaving VMs with a lot less. Sometimes, some pci cards can cause trouble by exceeding the available amount leading to problems... This mode changes the handling and makes it less demanding. I had trouble of the stream not lasting more than 5 minutes before shutting off, after adding this line per pci device it was ok for around 2 hours but then still died. I'm not trying out Xen 4.3.1 to see if that would work. Harder to manage as there are no guis but I've seen full GPU passthrough work fine in a windows 8 vm and also read tv tuners work. Xen is a full hypervisor built on your choice of linux but most of the commands are issued through SSH or via cfg files until the VM has booted. What is your hardware? Mine is as follows: AMD FX-6100 6 core cpu Gigabyte GA-970-UD3 (with IOMMU) 14GB Ram LSI SAS controller HDDs 2 x TBS 6981s. [/QUOTE]

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